method of splitting water

method of splitting water, Total:381 items.

The international standard classification for "method of splitting water" includes: Plastics , Cement. Gypsum. Lime. Mortar , Salts , Starch and derived products , Plastics and rubber insulating materials , Fruits. Vegetables , Geology. Meteorology. Hydrology , Temperature-measuring instruments , Chemical analysis , Industrial process measurement and control , Coated fabrics .

The Chinese standard classification for "method of splitting water" includes: Basic standards and general methods for synthetic resin and plastic , Cement , Rare metals and their alloys analysis method , Basic standards and general methods , Electrical insulating material and its products , Cash crop in general , Aquatic product and fishery in general , Hydrogeological survey , Oceanographic instrumentation , Analysis methods for substances in ocean , Industrial automation and control device in general , Industrial gas and chemical gas , Compartment auxiliary machine , Artificial leathers and synthetic leathers .

General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China

GB/T 12100-1989 Method for determination of water content in starch hydrolysis products
GB 12005.6-1989 Method for Determination of Degree of Hydrolysis of Partially Hydrolyzed Polyacrylamide
GB/T 12005.6-1989 Determination for hydrolysis degree of partly hydrolysis polyacrylamide
GB/T 12283-1990 Fruits,vegetables and derived products--Decomposition method of organic matter
GB/T 12009.2-1989 Isocyanates-Determination of hydrolyzable chlorine content
GB/T 20875.1-2007 Method of test for the hydrolytic stability of electrical insulating materials—Part 1:Plastic films
GB/T 7489-1987 quality - Determination of dissolved oxygen - Iodometric method
GB/T 16478.1-1996 Methods for chemical analysis of thorium nitrate--Insoluble substance in water
GB/T 12157-1989 Analysis of water used in boiler and cooling system--Determination for dissolved oxygen--Internal electrolysis
GB/T 12959-1991 Test method for heat of hydration of cement－The heat of solution method

Professional Standard - Agriculture

水产品质量安全检验手册 2.4.2.0-2005 Chapter 2 Basic analysis methods for physical and chemical testing of aquatic products Section 4 Determination of fat in aquatic products (GBT 5009.6-2003) 2. Acid hydrolysis method
GB 12283-1990 Fruits,vegetables and derived products-Decomposition method of organic matter

Group Standards of the People's Republic of China

T/AQSPMK 0003-2023 Test method of artificial leather and synthetic leather — Determination of hydrolysis resistance at high temperature
T/HNSPXH 024-2024 Determination of thaw drip loss rate of frozen meat Thawing method of thermostatic circulating water bath
T/HNNMIA 7-2023 Calcined dolomite analytical methods - Determination of activity - Hydrolysis method
T/QAS 066-2021 Determination of Dissolved Oxygen in Brine by Iodometric Method
T/AQSPMK 003-2023 Test method of artificial leather and synthetic leather—Determination of hydrolysis resistance at high temperature

Professional Standard - Coal

MT/T 743.3-1997 Determination of phosphorus in hydrolysable phosphate in mine water
MT/T 370-1994 Determination method of dissolved oxygen in coal mine water
MT/T 743.3-2011 Determination of Phosphorus in Hydrolysable Phosphate in Mine Water

Xinjiang Provincial Standard of the People's Republic of China

DB65/T 602.2-2001 The determinanation of hydrolyzable nitrogen in soil

Professional Standard - Petroleum

SY/T 6261-1996 Interpretation and Analysis Method of Pressure Drop Data of Water Injection Well
SY/T 5117-1996 Rock pyrolysis analysis method
SY/T 6987-2014 The method of jam releasing and sand washing on horizontal wells
SY 6987-2014 Horizontal well unblocking salvage and sand washing method

工业和信息化部

HG/T 5203-2017 Test method for activity of medium-temperature sulfur-tolerant hydrolysis catalysts
HG/T 5410-2018 Analytical method of chemical composition for medium-temperature sulfur-resistant hydrolysis catalysts

Professional Standard - Commodity Inspection

SN/T 0378-1995 Method of thawing in frozen fishery products for export

Professional Standard - Geology

DZ/T 0064.9-2021 Methods for analysis of groundwater quality- Part 9: Determination of total dissolved solid- Gravimetric method
DZ/T 0064.87-2021 Methods for analysis of groundwater quality- Part 87: Determination of δ13C - Online method for acidolysis by phosphoric acid- gas isotope ratio mass spectrometry
DZ/T 0064.9-1993 Groundwater quality test methods - the determination of total dissolved solid

Professional Standard - Ocean

HY/T 096-2007 Test method of seawater dissolved oxygen analyzer

中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会

GB/T 5832.1-2016 Gas analysis―Determination of moisture―Part 1:Electrolytic method
GB/T 33907-2017 Electrolytic solid moisture meter
GB/T 33584.5-2017 Seawater quality requirements and analysis methods for seawater cooling system. Part 5: Determination of dissolved solid

Professional Standard - Railway

TB 1601-1985 Analytical method of hydrolyzing polymaleic anhydride with water quality stabilizer for locomotive boilers

Professional Standard-Ships

CB 3328.4-1988 Water quality inspection method for discharge water from ship sewage treatment——Examination method for dissolved oxygen in water
CB* 3328.4-1988 Method for Inspecting Quality of Water Discharged from Treatment of Vessel Sewage - Method of Test for Oxygen Dissolved in Water

Professional Standard - Chemical Industry

HG/T 2481-2011 Explosion proof electrolytic gas moisture detector
HG/T 4859-2015 Analytical method of chemical composition for carbonyl sulfide hydrolyzed catalysis at room temperature

Professional Standard - Light Industry

QB/T 4671-2014 Test Method for Synthetic Leather/Artificial Leather – Resistance to Hydrolysis

Professional Standard - Environmental Protection

HJ 677-2013 Water quality - Digestion of total metals - Nitric acid digestion method
HJ 678-2013 Water quality - Digestion of total metals - Microwave assisted acid digestion method

国家能源局

SY/T 5849-2018 The evaluation method for removing plugging by chemicals in production and injection well

Taiwan Provincial Standard of the People's Republic of China

CNS 2744-1989 Method of Disassembly Inspection for Automobiles

Military Standard of the People's Republic of China-General Armament Department

GJB 465.3-1988 Test methods for anhydrous hydrazine resistance of vulcanized rubber Part 3: Catalytic decomposition test

Hebei Provincial Standard of the People's Republic of China

DB13/T 5294-2020 Performance test method of miniature pure water electrolyzer system

中华人民共和国环境保护部

GB 7489-1987 Water guality-Determination of dissolved oxyqen-Iodometric method

European Committee for Standardization (CEN)

EN 196-8:2003 Methods of testing cement - Part 8: Heat of hydration - Solution method
EN 196-8:2010 Methods of testing cement - Part 8: Heat of hydration - Solution method
EN 196-10:2006 Methods of testing cement - Part 10: Determination of the watersoluble chromium (VI) content of cement
EN 196-10:2016 Methods of testing cement - Part 10: Determination of the water-soluble chromium (VI) content of cement
EN ISO 7827:1995 Water Quality - Evaluation in an Aqueous Medium of the 碪ltimate?Aerobic Biodegradability of Organic Compounds - Method by Analysis of Dissolved Organic Carbon (DOC)
EN 14187-5:2003 Cold applied joint sealants - Part 5: Test method for the determination of the resistance to hydrolysis
EN 1165:1996 Feather and down - Test methods - Determination of water-soluble chlorides
EN ISO 15587-2:2002 Water Quality - Digestion for the Determination of Selected Elements in Water - Part 2: Nitric Acid Digestion ISO 15587-2: 2002
EN 25813:1992 Water Quality - Determination of Dissolved Oxygen - Iodometric Method

International Organization for Standardization (ISO)

ISO 29582-1:2009 Methods of testing cement - Determination of the heat of hydration - Part 1: Solution method
ISO 719:1981 Glass — Hydrolytic resistance of glass grains at 98 degrees C — Method of test and classification
ISO 720:1981 Glass — Hydrolytic resistance of glass grains at 121 degrees C — Method of test and classification
ISO 720:2020 Glass — Hydrolytic resistance of glass grains at 121 °C — Method of test and classification
ISO 7827:1994 Water quality - Evaluation in an aqueous medium of the "ultimate" aerobic biodegradability of organic compounds - Method by analysis of dissolved organic carbon (DOC)
ISO 4802:1982 Glass — Hydrolytic resistance of the interior surfaces of glass containers — Methods of test
ISO 7827:2010 Water quality - Evaluation of the "ready", "ultimate" aerobic biodegradability of organic compounds in an aqueous medium - Method by analysis of dissolved organic carbon (DOC)
ISO 787-14:1973 General method of test for pigments - Parts XIV: Determination of resistivity of aqueous extract
ISO/DIS 18724:2024 Water quality-Determination of dissolved chromium(VI) in water-Photometric method
ISO 5813:1983 Water quality; Determination of dissolved oxygen; Iodometric method

British Standards Institution (BSI)

BS EN 196-8:2003 Methods of testing cement - Part 8:Heat of hydration - Solution method
BS EN 196-8:2004 Methods of testing cement - Heat of hydration - Solution method
BS EN 196-8:2010 Methods of testing cement - Heat of hydration - Solution method
BS 2690-101:1984(2000) Methods oftesting Water used in industry — Part 101 : Dissolved oxygen
BS 6829-1.6:1991 Analysis of surface active agents (raw materials). General methods. Method for determination of solubility in water
BS EN 196-10:2006 Methods of testing cement - Determination of the water soluble chromium (VI) content of cement
BS EN 25814:1992 Method for determination of dissolved oxygen in water: electrochemical probe method
BS EN 61234-1:1994 Method of test for hydrolytic stability of electrical insulating materials. Method of test for hydrolytic stability of electrical insulating materials. Plastic films
BS ISO 21701:2019 Textiles. Test method for accelerated hydrolysis of textile materials and biodegradation under controlled composting conditions of the resulting hydrolysate
BS EN ISO 14911:1999(2008) Water quality — Determination of dissolved Li +, Na +, NH4 +, K +, Mn2 +, Ca2 +, Mg2 +, Sr2 + and Ba2 + using ion chromatography — Method for water and waste water
19/30395375 DC BS ISO 719. Glass. Hydrolytic resistance of glass grains at 98 degrees C. Method of test and classification
BS ISO 719:2020 Glass. Hydrolytic resistance of glass grains at 98 °C. Method of test and classification
BS EN 14187-5:2003 Cold applied joint sealants - Test method for the determination of the resistance to hydrolysis
BS ISO 720:2020 Glass. Hydrolytic resistance of glass grains at 121 °C. Method of test and classification
BS EN ISO 17852:2006 Water quality - Determination of mercury - Method using a combined preservation and digestion step followed by atomic fluorescence spectrometry
BS EN ISO 19340:2017 Water quality. Determination of dissolved perchlorate. Method using ion chromatography (IC)
BS EN 1165:1997 Feather and down - Test methods - Determination of water-soluble chlorides
BS EN 14187-5:2019 Cold applied joint sealants. Test methods. Determination of the resistance to hydrolysis
BS EN ISO 7827:2012 Water quality. Evaluation of the "ready", "ultimate" aerobic biodegradability of organic compounds in an aqueous medium. Method by analysis of dissolved organic carbon (DOC)
24/30463987 DC BS EN ISO 18724 Water quality — Determination of dissolved chromium(VI) in water — Photometric method
19/30395378 DC BS ISO 720. Glass. Hydrolytic resistance of glass grains at 121 degrees C. Method of test and classification
BS EN ISO 5381:1994(1999) Starch hydrolysis products — Determination ofwater content — Modified Karl Fischer method
BS EN 1164:1999 Feather and down - Test methods - Determination of the turbidity of an aqueous extract

AT-ON

ONORM M 6600-1992 Water analysis - Statistical methods in water analysis - Terms and definitions
ONORM M 6612-2001 Water analysis - Calcit saturation of water
ONORM ISO 7827:1987 Water quality; evaluation in an aqueous medium of the "ultimate" aerobic biodegradability of organic Compounds; method by analysis of dissolved organic carbon (DOC)

PL-PKN

PN-EN 196-8-2010 P Methods of testing cement -- Part 8: Heat of hydration -- Solution method

Spanish Association for Standardization (UNE)

UNE-EN 196-8:2010 Methods of testing cement - Part 8: Heat of hydration - Solution method
UNE-EN ISO 15587-1:2002 Water quality - Digestion for the determination of selected elements in water- Part 1: Aqua regia digestion. (ISO 15587-1:2002)
UNE 40241-1:1973 METHOD OF DETERMINATION THE CONTENT IN CISTEMIC ACID OF WOOL HYDROLIZED BY MEANS OF ELECTROPHORESIS IN PAPER AND COLOURIMETRY.
UNE-EN ISO 15587-2:2002 Water quality- Digestion for the determantion of selected elements in water - Part 2: Nitric acid digestion. (ISO 15587-2:2002)
UNE 34220:1981 FRUIT, VEGETABLES AND DERIVED PRODUCTS. DESCOMPOSITION OF ORGANIC MATTER PRIOR TO ANALYSIS. ASHING METHOD.
UNE-EN ISO 5381:1995 STARCH HYDROLYSIS PRODUCTS. DETERMINATION OF WATER CONTENT. MODIFIED KARL FISCHER METHOD. (ISO 5381:1983).
UNE 40241-2:1975 PRECISIONS IN THE METHOD OF DETERMINING THE CONTENT IN CISTERNIC ACID OF HYDROLIZED OF WOOL BY MEANS OF ELECTROPHORESIS ON PAPER AND COLOURIMETRY.
UNE 400322:1999 GLASS. HYDROLYTIC RESISTENCE OF GLASS GRAINS AT 98 oC. METHOD OF TEST AND CLASSIFICATION.
UNE 400323:1999 GLASS. HYDROLITIC RESISTANCE OF GLASS GRAINS AT 121 oC. METHOD OF TEST AND CLASSIFICATION.
UNE-EN 14187-5:2004 Cold applied joint sealants - Part 5: Test method for the determination of the resistance to hydrolysis
UNE-EN 14187-5:2020 Cold applied joint sealants - Test methods - Part 5: Determination of the resistance to hydrolysis
UNE-EN ISO 19340:2018 Water quality - Determination of dissolved perchlorate - Method using ion chromatography (IC) (ISO 19340:2017)
UNE-EN ISO 7827:1998 ERRATUM WATER QUALITY. EVALUATION IN AN AQUEOUS MEDIUM OF THE "ULTIMATE" AEROBIC BIODEGRADABILITY OF ORGANIC COMPOUNDS. METHOD BY ANALYSIS OF DISSOLVED ORGANIC CARBON (DOC). (ISO 7827:1994).
UNE-EN ISO 7827:1996 WATER QUALITY. EVALUATION IN AN AQUEOUS MEDIUM OF THE "ULTIMATE" AEROBIC BIODEGRADABILITY OF ORGANIC COMPOUNDS. METHOD BY ANALYSIS OF DISSOLVED ORGANIC CARBON (DOC). (ISO 7827:1994).
UNE-EN 12746:2001 FOOTWEAR - TEST METHODS FOR INSOLES AND INSOCKS - WATER ABSORPTION AND DESORPTION.
UNE-EN ISO 22649:2016 Footwear - Test methods for insoles and insocks - Water absorption and desorption (ISO 22649:2016)

Lithuanian Standards Office

LST EN 196-8-2010 Methods of testing cement - Part 8: Heat of hydration - Solution method
LST EN ISO 15587-1:2004 Water quality - Digestion for the determination of selected elements in water - Part 1: Aqua regia digestion (ISO 15587-1:2002)
LST EN ISO 15587-2:2004 Water quality - Digestion for the determination of selected elements in water - Part 2: Nitric acid digestion (ISO 15587-2:2002)
LST EN 12746-2002/A1-2005 Footwear - Test methods for insoles and insocks - Water absorption and desorption
LST EN 12746-2001 Footwear - Test methods for insoles and insocks - Water absorption and desorption
LST EN 14187-5-2004 Cold applied joint sealants - Part 5: Test method for the determination of the resistance to hydrolysis

Korean Agency for Technology and Standards (KATS)

KS I ISO 5813-2014(2019) Water quality — Determination of dissolved oxygen — Iodometric method
KS D 1890-2012 Method for chemical analysis of electrolytic cathode copper
KS C IEC 61234-2:2002 Method of test for the hydrolytic stability of electrical insulating materials－Part 2：Moulded thermosets
KS D 1890-1987 Method for chemical analysis of electrolytic cathode copper
KS L ISO 719-2012(2017) Glass－Hydrolytic resistance of glass grains at 98 ℃－Method of test and classification
KS L ISO 719:2022 Glass — Hydrolytic resistance of glass grains at 98 ℃ — Method of test and classification
KS M ISO 22649-2004(2019) Footwear — Test methods for insoles and insocks — Water absorption and desorption
KS H ISO 5381-2008(2018) Starch hydrolysis products－Determination of water content－Modified Karl Fischer method
KS K 0936-2007 Geotextiles and geotextile-related products－Screening test method for determining the resistance to hydrolysis in water
KS I ISO 15587-1-2008(2013) Water quality－Digestion for the determination of selected elements in water－Part 1：Aqua regia digestion
KS C IEC 61234-1:2002 Method of test for the hydrolytic stability of electrical insulating materials－Part 1：Plastic films
KS I ISO 7827:2008 Water quality－Evaluation in an aqueous medium of the “ultimate”aerobic biodegradability of organic compounds－Method by analysis of dissolved organic carbon(DOC)
KS D 1890-2012(2020) Method for chemical analysis of electrolytic cathode copper
KS I 3221-2007 Water quality－Evaluation of the aerobic biodegradability of organic compounds in an aqueous medium[Semi-continuous activated sludge method(SCAS)]
KS H ISO 5381-2023 Starch hydrolysis products－Determination of water content－Modified Karl Fischer method
KS M 3210-2009 Plastics-Determination of cadmium-Wet decomposition method
KS I ISO 5813:2007 Water quality-Determination of dissolved oxygen-Iodometric method
KS I ISO 5813:2014 Water quality — Determination of dissolved oxygen — Iodometric method
KS I ISO 5813-2019 Water quality — Determination of dissolved oxygen — Iodometric method

German Institute for Standardization

DIN EN 196-8 E:1997-05 Methods of testing cement - Part 8: Heat of hydration - Solution method
DIN EN 196-8 E:2009-09 Methods of testing cement - Part 8: Heat of hydration - Solution method
DIN EN 196-8:2010 Methods of testing cement - Part 8: Heat of hydration - Solution method; German version EN 196-8:2010
DIN EN 196-10:2006 Methods of testing cement - Part 10: Determination of the water-soluble chromium (VI) content of cement; English version of DIN EN 196-10:2006-10
DIN ISO 719:1989 Glass; hydrolytic resistance of glass grains at 98 °C; method of test and classification; identical with ISO 719:1985
DIN ISO 720:1989 Glass; Hydrolytic resistance of glass grains at 121 °C; method of test and classification; identical with ISO 720:1985
DIN EN 14187-5:2003 Cold applied joint sealants - Part 5: Test method for the determination of the resistance to hydrolysis; German version EN 14187-5:2003
DIN ISO 720:2021-12 Glass - Hydrolytic resistance of glass grains at 121 °C - Method of test and classification (ISO 720:2020)
DIN ISO 719:2021-12 Glass - Hydrolytic resistance of glass grains at 98 °C - Method of test and classification (ISO 719:2020)
DIN EN 196-10 E:2015-08 Methods of testing cement - Part 10: Determination of the water-soluble chromium (VI) content of cement
DIN EN ISO 7827:2013-03 Water quality - Evaluation of the "ready", "ultimate" aerobic biodegradability of organic compounds in an aqueous medium - Method by analysis of dissolved organic carbon (DOC) (ISO 7827:2010); German version EN ISO 7827:2012
DIN EN 14187-5:2019-06 Cold applied joint sealants - Test methods - Part 5: Determination of the resistance to hydrolysis; German version EN 14187-5:2019
DIN EN 14187-5:2019 Cold applied joint sealants - Test methods - Part 5: Determination of the resistance to hydrolysis
DIN ISO 719 E:2021-06 Glass - Hydrolytic resistance of glass grains at 98 °C - Method of test and classification
DIN ISO 720 E:2021-06 Glass - Hydrolytic resistance of glass grains at 121 °C - Method of test and classification
DIN EN ISO 7827:1996 Water quality - Evaluation of the "ready", "ultimate" aerobic biodegradability of organic compounds in an aqueous medium - Method by analysis of dissolved organic carbon (DOC)
DIN EN ISO 19340:2019-01 Water quality - Determination of dissolved perchlorate - Method using ion chromatography (IC) (ISO 19340:2017); German version EN ISO 19340:2017
DIN EN ISO 15587-1:2002-07 Water quality - Digestion for the determination of selected elements in water - Part 1: Aqua regia digestion (ISO 15587-1:2002); German version EN ISO 15587-1:2002
DIN EN 196-8:2004 Test methods for cement – Part 8: Heat of hydration; solution procedure; German version EN 196-8:2003
DIN EN ISO 7827 E:2012-06 Water quality Dissolved organic carbon analysis method (DOC) for the evaluation of "pre-" and "limit" aerobic biodegradability of organic compounds in aqueous media (draft)
DIN EN ISO 15587-2:2002-07 Water quality - Digestion for the determination of elements in water - Part 2: Nitric acid digestion (ISO 15587-2:2002); German version EN ISO 15587-2:2002
DIN EN 14187-5 E:2014-12 Cold applied joint sealants - Test methods - Part 5: Determination of the resistance to hydrolysis
DIN EN 14187-5 E:2001-09 Cold applied joint sealants - Test methods - Part 5: Determination of the resistance to hydrolysis
DIN EN 12746:2005 Footwear - Test methods for insoles and insocks - Water absorption and desorption; German version EN 12746:2000 + A1:2005
DIN EN ISO 22649:2016-10 Footwear - Test methods for insoles and insocks - Water absorption and desorption (ISO 22649:2016); German version EN ISO 22649:2016
DIN EN 25813:1993 Water quality; determination of dissolved oxygen; iodometric method (ISO 5813:1983); german version EN 25813:1992

Danish Standards Foundation

DS/EN 196-8:2010 Methods of testing cement - Part 8: Heat of hydration - Solution method
DS/EN ISO 15587-1:2003 Water quality - Digestion for the determination of selected elements in water - Part 1: Aqua regia digestion
DS/EN ISO 15587-2:2003 Water quality - Digestion for the determination of selected elements in water - Part 2: Nitric acid digestion (ISO 15587-2:2002)
DS/EN 12746/A1:2005 Footwear - Test methods for insoles and insocks - Water absorption and desorption
DS/EN 12746:2000 Footwear - Test methods for insoles and insocks - Water absorption and desorption
DS/EN 14187-5:2003 Cold applied joint sealants - Part 5: Test method for the determination of the resistance to hydrolysis
DS/EN 61234-1:1998 Method of test for the hydrolytic stability of electrical insulating materials - Part 1: Plastic films
DS/EN ISO 14911:2000 Water quality - Determination of dissolved Li+,Na+,NH4+,K+,Mn2+,Ca2+,Mg2+,Sr2+ and Ba2+ using ion chromatography - Method for water and waste water
DS/EN ISO 5381:1995 Starch hydrolysis products - Determination of water content - Modified Karl Fischer method
DS/EN 25813:2003 Water quality - Determination of dissolved oxygen - Iodometric method

SCC

BS 3762-3-3.3:1983 Analysis of formulated detergents. Quantitative test methods-Method for determination of hydrolyzable and non-hydrolyzable anionic-active matter content after hydrolysis under acid conditions
BS 3762-3-3.2:1983 Analysis of formulated detergents. Quantitative test methods-Method for determination of hydrolyzable and non-hydrolyzable anionic-active matter content after hydrolysis under alkaline conditions
BS 3762-3-3.3:1987 Analysis of formulated detergents-Quantitative test methods-Method for determination of hydrolyzable and non-hydrolyzable anionic-active matter content after hydrolysis under acid conditions
BS 5256-1:1976 Methods of test for starch hydrolysis products
AWWA DSS54639 An Integrated Approach to Understand Water Quality Failures in Distribution Systems
AWWA QTC98228 An Innovative Approach to Understanding and Improving Distribution System Water Quality
AWWA ACE70666 Innovative Methods to Address Non-Revenue Water
AENOR UNE 34096-9:1981 Analysis methods for spices. Determination of the extract soluble in cold water.
CAN/CGSB 4.2 No.63.4-2007/ISO 14184-1:1998 Méthodes pour épreuves textiles: Textiles - Dosage du formaldéhyde - Partie 1: Formaldéhyde libre et hydrolysé (Méthode par extraction deau)
AWWA DSS63740 Operation and Modeling Approaches for Addressing Water Quality Problems in the Distribution System
BS 2690-101:1984 Methods of testing water used in industry-Dissolved oxygen
DANSK DS/ISO 719:2020 Glass – Hydrolytic resistance of glass grains at 98 °C – Method of test and classification
BS 6068-5-5.6:1985 Water quality. Biological methods-Evaluation in an aqueous medium of the 'ultimate' aerobic biodegradability of organic compounds: method by analysis of dissolved organic carbon (DOC)
AENOR UNE-EN ISO 7827:2013 Water quality - Evaluation of the "ready", "ultimate" aerobic biodegradability of organic compounds in an aqueous medium - Method by analysis of dissolved organic carbon (DOC) (ISO 7827:2010)
DANSK DS/ISO 720:2020 Glass – Hydrolytic resistance of glass grains at 121 °C – Method of test and classification
BS EN ISO 7827:1996 Water quality. Evaluation in an aqueous medium of the 'ultimate' aerobic biodegradability of organic compounds. Method by analysis of dissolved organic carbon (DOC)
NS-EN 14187-5:2003 Cold applied joint sealants — Part 5: Test method for the determination of the resistance to hydrolysis
DANSK DS/EN 14187-5:2019 Cold applied joint sealants – Test methods – Part 5: Determination of the resistance to hydrolysis
NS-EN 14187-5:2019 Cold applied joint sealants — Test methods — Part 5: Determination of the resistance to hydrolysis
NS-EN ISO 7827:2012 Water quality — Evaluation of the "ready", "ultimate" aerobic biodegradability of organic compounds in an aqueous medium — Method by analysis of dissolved organic carbon (DOC) (ISO 7827:2010)
AWWA WSC63702 Communication Options to Mitigate a Water Crisis
AWWA WQTC64003 Formation of Floating Calcite Rafts in a Drinking Water Reservoir
AENOR UNE-EN 12746:2001 Footwear. Test methods for insoles and insoles. Absorption and desorption of water.
AWWA 51737 Collaborative Approaches to Solving Complex Water Issues: The Challenge of ESA Compliance
DANSK DS/EN ISO 15587-1:2003 Water quality - Digestion for the determination of selected elements in water - Part 1: Aqua regia digestion
DIN EN ISO 7827 E:2012 Draft Document - Water quality - Evaluation of the "ready", "ultimate" aerobic biodegradability of organic compounds in an aqueous medium - Method by analysis of dissolved organic carbon (DOC) (ISO 7827:2010); German version FprEN I...
DANSK DS/EN ISO 5381:1994 Starch hydrolysis products - Determination of water content - Modified Karl Fischer method
CAN/CGSB-4.2 No. 63.4-2007/ISO 14184-1:1998 Textile Test Methods Textiles - Determination of Formaldehyde - Part 1: Free and Hydrolyzed Formaldehyde (Water Extraction Method)
AWWA ACE63159 Addressing Uncertainty in Integrated Water Resource Planning: A Risk Methodology
DANSK DS/EN 12746:2000 Footwear – Test methods for insoles and insocks – Water absorption and desorption
CAN/CGSB-25.1 No.45.1-1995 Methods of Sampling and Testing Waxes and Polishes Solubility in Water
AWWA ACE65189 Membrane Solution for Water Reuse
DANSK DS/EN 25813:2003 Water quality - Determination of dissolved oxygen - Iodometric method
BS 2690-121:1981 Methods of testing water used in industry-Dissolved solids: gravimetric method (after evaporation)

Canadian General Standards Board （CGSB)

CGSB 1-GP-71 METH 24.2-1980 Test Methods for Paints and Pigments Water Content Toluene Solubility Method
CAN/CGSB-4.2 NO.63.4-2016 Textile test methods Textiles - Determination of formaldehyde - Part 1: Free and hydrolyzed formaldehyde (water extraction method)
CGSB 4.2 NO. 63.4-2007-CAN/CGSB-2007 M閠hodes pour 閜reuves textiles Textiles ?Dosage du formald閔yde ?Partie 1: Formald閔yde libre et hydrolys?(M閠hode par extraction d抏au)

CU-NC

NC 46-04-1986 Glass, Determination of Hydrolytic. Resistance of Glass Grains at 121 °C. Testing Method and Classification
NC 46-03-1986 Glass. Determination of Hydrolytic Resistance of Glass Grains at 98 °C. Testing Method and Classification

American Society for Testing and Materials (ASTM)

ASTM D5543-09 Standard Test Methods for Low-Level Dissolved Oxygen in Water
ASTM D888-92(1996) Standard Test Methods for Dissolved Oxygen in Water
ASTM D5543-21 Standard Test Method for Low-Level Dissolved Oxygen in Water
ASTM D888-03 Standard Test Methods for Dissolved Oxygen in Water
ASTM D5543-94(2005) Standard Test Methods for Low-Level Dissolved Oxygen in Water
ASTM D5543-94(1999)e1 Standard Test Methods for Low-Level Dissolved Oxygen in Water
ASTM D888-18 Standard Test Methods for Dissolved Oxygen in Water
ASTM D5543-15 Standard Test Method for Low-Level Dissolved Oxygen in Water
ASTM D888-12e1 Standard Test Methods for Dissolved Oxygen in Water
ASTM D888-12 Standard Test Methods for Dissolved Oxygen in Water
ASTM D888-09 Standard Test Methods for Dissolved Oxygen in Water
ASTM D888-05 Standard Test Methods for Dissolved Oxygen in Water
ASTM D1110-84(1995)e1 Standard Test Methods for Water Solubility of Wood
ASTM D1110-84(2007) Standard Test Methods for Water Solubility of Wood
ASTM D1110-21 Standard Test Methods for Water Solubility of Wood
ASTM D1110-84(2001) Standard Test Methods for Water Solubility of Wood
ASTM D1110-84(2013) Standard Test Methods for Water Solubility of Wood
ASTM D1888-78e1 Methods of Test for Particulate and Dissolved Matter in Water
ASTM D548-97(2002) Standard Test Method for Water-Soluble Acidity or Alkalinity of Paper
ASTM D5462-08 Standard Test Method for On-Line Measurement of Low-Level Dissolved Oxygen in Water
ASTM D5462-93(2001) Standard Test Method for On-Line Measurement of Low-Level Dissolved Oxygen in Water
ASTM D5462-02 Standard Test Method for On-Line Measurement of Low-Level Dissolved Oxygen in Water
ASTM D2619-09 Standard Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)
ASTM D5462-13 Standard Test Method for On-Line Measurement of Low-Level Dissolved Oxygen in Water
ASTM D2619-95 Standard Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)
ASTM D2619-95(2002)e1 Standard Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)
ASTM D261-75(1999) Standard test method for hydrolytic stability of hydraulic fluids (wine bottle method)
ASTM D2619-09(2014) Standard Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)
ASTM D3137-81(2007) Standard Test Method for Rubber Property8212;Hydrolytic Stability
ASTM E896-92(2005) Standard Test Method for Conducting Aqueous Direct Photolysis Tests
ASTM D3137-81(2001) Standard Test Method for Rubber Property8212;Hydrolytic Stability
ASTM D513-16 Standard Test Methods for Total and Dissolved Carbon Dioxide in Water
ASTM D6721-01 Standard Test Method for Determination of Chlorine in Coal by Oxidative Hydrolysis Microcoulometry
ASTM D3137-81(2013) Standard Test Method for Rubber Propertymdash;Hydrolytic Stability
ASTM D3137-81(1994) Standard Test Method for Rubber Property8212;Hydrolytic Stability
ASTM D6721-01(2006) Standard Test Method for Determination of Chlorine in Coal by Oxidative Hydrolysis Microcoulometry
ASTM E114-95(2001) Standard Practice for Ultrasonic Pulse-Echo Straight-Beam Examination by the Contact Method
ASTM E1148-87(1993)e1 Standard Test Method for Measurements of Aqueous Solubility
ASTM RR-D05-1030 2002 D6721-Test Method for Determination of Chlorine in Coal by Oxidative Hydrolysis Microcoulometry
ASTM E1148-02(2008) Standard Test Method for Measurements of Aqueous Solubility
ASTM E1148-02 Standard Test Method for Measurements of Aqueous Solubility
ASTM D4940-98 Standard Test Method for Conductimetric Analysis of Water Soluble Ionic Contamination of Blasting Abrasives
ASTM E896-92(2005)e1 Standard Test Method for Conducting Aqueous Direct Photolysis Tests
ASTM RR-D02-1195 1985 D3240-Test Method for Undissolved Water In Aviation Turbine Fuels
ASTM RR-D02-1804 2015 D3240-Test Method for Undissolved Water In Aviation Turbine Fuels
ASTM E896-92(1997) Standard Test Method for Conducting Aqueous Direct Photolysis Tests
ASTM D4940-15 Standard Test Method for Conductimetric Analysis of Water Soluble Ionic Contamination of Blast Cleaning Abrasives
ASTM D3137-81(2018) Standard Test Method for Rubber Property—Hydrolytic Stability
ASTM RR-D02-1712 2010 D3240-Test Method for Undissolved Water In Aviation Turbine Fuels
ASTM D4940-98(2003) Standard Test Method for Conductimetric Analysis of Water Soluble Ionic Contamination of Blasting Abrasives
ASTM D4940-15e1 Standard Test Method for Conductimetric Analysis of Water Soluble Ionic Contamination of Blast Cleaning Abrasives
ASTM D513-02 Standard Test Methods for Total and Dissolved Carbon Dioxide in Water
ASTM D513-11e1 Standard Test Methods for Total and Dissolved Carbon Dioxide in Water
ASTM RR-D02-1584 2005 D5864-Test Method for Determining Aerobic Aquatic Biodegradation of Lubricants or Their Components
ASTM D2619-21 Standard Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)
ASTM RR-D02-1154 1982 D2619-Standard Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)
ASTM D6721-24 Standard Test Method for Determination of Chlorine in Coal by Oxidative Hydrolysis Microcoulometry
ASTM E1641-04 Standard Test Method for Decomposition Kinetics by Thermogravimetry
ASTM D3240-05 Standard Test Method for Undissolved Water In Aviation Turbine Fuels
ASTM D3240-91(1996) Standard Test Method for Undissolved Water In Aviation Turbine Fuels
ASTM D6721-01(2015) Standard Test Method for Determination of Chlorine in Coal by Oxidative Hydrolysis Microcoulometry
ASTM C563-15 Standard Test Method for Approximation of Optimum SO 3 in Hydraulic Cement Using Compressive Strength
ASTM D5864-18 Standard Test Method for Determining Aerobic Aquatic Biodegradation of Lubricants or Their Components
ASTM RR-D02-1676 2009 D2619-Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)
ASTM D5864-17 Standard Test Method for Determining Aerobic Aquatic Biodegradation of Lubricants or Their Components
ASTM D5864-23 Standard Test Method for Determining Aerobic Aquatic Biodegradation of Lubricants or Their Components
ASTM D3240-15 Standard Test Method for Undissolved Water In Aviation Turbine Fuels
ASTM C563-03 Standard Test Method for Optimum SO ₃ in Hydraulic Cement Using 24-h Compressive Strength
ASTM D3240-22a Standard Test Method for Undissolved Water In Aviation Turbine Fuels
ASTM D5864-11 Standard Test Method for Determining Aerobic Aquatic Biodegradation of Lubricants or Their Components
ASTM D3240-10 Standard Test Method for Undissolved Water In Aviation Turbine Fuels
ASTM D1726-03 Standard Test Methods for Hydrolyzable Chloride Content of Liquid Epoxy Resins
ASTM D513-06 Standard Test Methods for Total and Dissolved Carbon Dioxide in Water
ASTM D1726-11 Standard Test Methods for Hydrolyzable Chloride Content of Liquid Epoxy Resins
ASTM E1641-16 Standard Test Method for Decomposition Kinetics by Thermogravimetry Using the Ozawa/Flynn/Wall Method
ASTM D3240-91(2001) Standard Test Method for Undissolved Water In Aviation Turbine Fuels
ASTM E1131-98 Standard Test Method for Compositional Analysis by Thermogravimetry
ASTM D3240-11 Standard Test Method for Undissolved Water In Aviation Turbine Fuels
ASTM F1635-04a Standard Test Method for in Vitro Degradation Testing of Hydrolytically Degradable Polymer Resins and Fabricated Forms for Surgical Implants
ASTM F1635-04 Standard Test Method for in Vitro Degradation Testing of Hydrolytically Degradable Polymer Resins and Fabricated Forms for Surgical Implants

RU-GOST R

GOST 31958-2012 Water. Methods for determination of total and dissolved organic carbon
GOST R 52991-2008 Water. Methods for determination of total and dissolved organic carbon
GOST R 53974-2010 Enzyme preparations for food industry. Method for determination of proteolitic activity
GOST 33396-2015 Geosynthetic materials. Method for determination of resistance to hydrolysis in water
GOST 10650-2013 Peat. Methods for the determination of the disintegration degree
GOST R ISO 7827-2016 Water quality. Evaluation of the «ready», «ultimate» aerobic biodegradability of organic compounds in an aqueous medium. Method by analysis of dissolved organic carbon (DOC)
GOST 26176-1991 Fodders, mixed feeds. Methods for determination of soluble and hidrolysable carbohydrates
GOST 32509-2013 Surface-active agents. Method for determination of biodegradability rate in aquatic environment

VN-TCVN

TCVN 4404-1987 Cultivated soil.Methods for determination of hydrolytic acidity
TCVN 6621-2000 Water quality.Evaluation in an aqueous medium of the "ultimate" aerobic biodegradability of organic compounds.Method by analysis of dissolved organic cacbon (DOC)
TCVN 5285-1990 Animal feeding stuffs.Method for determination of soluble and hydrolysable carbohydrates content by antrone reagent
TCVN 7324-2004 Water quality.Determination of dissolved oxygen.Lodometric method

Standard Association of Australia （SAA）

AS 4828.1:2009 Test methods for degradability of plastics Determination of degradation promoting ion levels
AS 1871.1:1976 List of methods for the examination of waters Dissolved oxygen (DO)
AS 1301.004:2019 Methods of test for pulp and paper, Method 004: Solubility of wood in boiling water
AS 1095.3.6:1975 Microbiological methods for the dairy industry, Part 3.6: Methods of examination for specific groups of microorganisms - Proteolytic organisms
AS P1.P4M:1961 Methods of test for pulp and paper - Solubility of wood in boiling water

SE-SIS

SIS SS 02 81 88-1987 Determination of dissolved oxygen content in water - Electrochemical method

GOST

GOST R 71044-2023 Soils. Methods for determining the solubility of soils in water
GOST ISO 720-2023 Glass. Hydrolytic resistance of glass grains at 121 °C. Method of test and classification
GOST ISO 22649-2023 Footwear. Test methods for insoles and insocks. Water absorption and desorption
GOST 33202-2023 Glass packaging. Glass. Hydrolytic resistance of glass grains at 98 °C. Method of test and classification

GSO

GSO ISO 719:2010 Glass -- Hydrolytic resistance of glass grains at 98 degrees C -- Method of test and classification
OS GSO ISO 720:2010 Glass -- Hydrolytic resistance of glass grains at 121 degrees C -- Method of test and classification
OS GSO ISO 719:2010 Glass -- Hydrolytic resistance of glass grains at 98 degrees C -- Method of test and classification
GSO ISO 720:2010 Glass -- Hydrolytic resistance of glass grains at 121 degrees C -- Method of test and classification
BH GSO ISO 21701:2023 Textiles —Test method for accelerated hydrolysis of textile materials and biodegradation under controlled composting conditions of the resulting hydrolysate
GSO ISO 21701:2022 Textiles —Test method for accelerated hydrolysis of textile materials and biodegradation under controlled composting conditions of the resulting hydrolysate
BH GSO ISO 14911:2016 Water quality -- Determination of dissolved Li+, Na+, NH4+, K+, Mn2+, Ca2+, Mg2+, Sr2+ and Ba2+ using ion chromatography -- Method for water and waste water
GSO ISO 7827:2013 Water quality -- Evaluation of the "ready", "ultimate" aerobic biodegradability of organic compounds in an aqueous medium -- Method by analysis of dissolved organic carbon (DOC)
OS GSO ISO 14911:2013 Water quality -- Determination of dissolved Li+, Na+, NH4+, K+, Mn2+, Ca2+, Mg2+, Sr2+ and Ba2+ using ion chromatography -- Method for water and waste water
GSO ISO 14911:2013 Water quality -- Determination of dissolved Li+, Na+, NH4+, K+, Mn2+, Ca2+, Mg2+, Sr2+ and Ba2+ using ion chromatography -- Method for water and waste water
GSO ISO 11905-1:2013 Water quality -- Determination of nitrogen -- Part 1: Method using oxidative digestion with peroxodisulfate
OS GSO ISO 15587-1:2015 Water quality -- Digestion for the determination of selected elements in water -- Part 1: Aqua regia digestion
OS GSO 116:1989 METHODS OF TEST FOR DRINKING AND MINERAL WATER – PART 3: DETERMINATION OF TOTAL DISSOLVED SOLIDS, pH VALUE AND RESIDUAL CHLORINE
GSO 116:1989 METHODS OF TEST FOR DRINKING AND MINERAL WATER – PART 3: DETERMINATION OF TOTAL DISSOLVED SOLIDS, pH VALUE AND RESIDUAL CHLORINE
OS GSO ISO 5381:2015 Starch hydrolysis products -- Determination of water content -- Modified Karl Fischer method
GSO ISO 5813:2015 Water quality -- Determination of dissolved oxygen -- Iodometric method
BH GSO ISO 5813:2016 Water quality -- Determination of dissolved oxygen -- Iodometric method

Association Francaise de Normalisation

NF ISO 719:2020 Verre - Résistance hydrolytique du verre en grains à 98 oC - Méthode d'essai et classification
NF ISO 720:2020 Verre - Résistance hydrolytique du verre en grains à 121 oC - Méthode d'essai et classification
XP T90-318:1995 Testing waters - Evaluation in an aqueous medium of biodegradable dissolved organic carbon - Method using suspended bacteria
NF B30-106:1986 Glass. Hydrolytic resistance of glass grains at 98 degrees Celsius. Method of test and classification.
NF S90-072:2020 Glass - Hydrolytic resistance of glass grains at 121 oC - Method of test and classification
XP T90-319:1995 Testing waters - Evaluation in an aqueous medium of biodegradable dissolved organic carbon - Method using fixed bacteria
NF B30-107:1986 Glass. Hydrolytic resistance of glass grains at 121 degrees Celsius. Method of test and classification.
NF S90-071:2020 Glass - Hydrolytic resistance of glass grains at 98 oC - Method of test and classification
NF EN ISO 7827:2013 Water quality - Evaluation of the "easy", "ultimate" aerobic biodegradability of organic compounds in an aqueous environment - Method by analysis of dissolved organic carbon (DOC)
NF EN 14187-5:2019 Cold applied joint sealants - Test methods - Part 5: determination of resistance to hydrolysis
NF G62-406*NF EN ISO 22649:2016 Footwear - Test methods for insoles and insocks - Water absorption and desorption
NF P98-897-5*NF EN 14187-5:2019 Cold applied joint sealants - Test methods - Part 5 : determination of the resistance to hydrolysis
NF P98-897-5:2003 Cold applied joint sealants - Part 5 : test method for the determination of the resistance to hydrolysis.
NF EN ISO 15587-1:2002 Water quality - Digestion for the determination of certain elements in water - Part 1: digestion with aqua regia
NF T90-312*NF EN ISO 7827:2013 Water quality - Evaluation of the "ready", "ultimate" aerobic biodegradability of organic compounds in an aqueous medium - Method by analysis of dissolved organic carbon (DOC)
NF G38-164:2003 Geotextiles and geotextile-related products - Screening test method for determining the resistance to hydrolysis in water.
NF T90-141*NF EN 25813:1993 Water quality - Determination of dissolved oxygen - Iodometric method.
NF EN 25813:1993 Water quality - Dissolved oxygen dosage - Iodometric method

Indonesia Standards

SNI 01-1305-1989 Wood, Test method for cold hot water solubility
SNI ISO 22649:2011 Footwear - Test methods for insoles and insocks - Water absorption and desorption

National Aeronautics and Space Administration (NASA)

NASA NACA-TN-925-1944 A least-squares procedure for the solution of the lifting-line integral equation

TH-TISI

TIS 121.33-2013 Standard test methods for textiles.part 33: determination of formaldehyde (free and hydrolysed formaldehyde)-water extraction method

Australian/New Zealand Standard (AU-AS/NZS)

AS/NZS 1301.004S:1998 Methods of test for pulp and paper, Method 004s: Solubility of wood in boiling water
AS/NZS 1301.004s:2007 Methods of test for pulp and paper - Solubility of wood in boiling water

KR-KS

KS L ISO 719-2022 Glass — Hydrolytic resistance of glass grains at 98 ℃ — Method of test and classification
KS H ISO 5381-2008(2023) Starch hydrolysis products－Determination of water content－Modified Karl Fischer method

US-FCR

FCR FED MCD-34-1979 WASTEWATER: IS MUSKEGON COUNTY'S SOLUTION YOUR SOLUTION?

FI-SFS

SFS 3043-1978 Determination of hydrolyzed aluminum. Spectrophotometry

CZ-CSN

CSN 66 6138-1985 Surface active agents. Methods for determination of turbidity temperature of water solutions
CSN ISO 719:1992 Glass. Hydraulytic resistance of glass at 98 grad C - Method of test and classification
CSN ISO 720:1992 Glass. Hydraulytic resistance of glass at 121 grad C - Method of test and classification
CSN 70 0530-1981 Silicate glass Method for determination oí the hy?trolytic resistance at 121 °C
CSN 70 0529-1986 Silicate glass. Method for determinatlon of the hydrolytic resistence at 121 °C. Surface test.

HU-MSZT

MSZ 260/15.lap-1967 Determination of waste water, calculation method of dissolved oxygen and oxygen saturation percentage

CEN - European Committee for Standardization

PREN ISO 22649:2013 Footwear - Test methods for insoles and insocks - Water absorption and desorption
PREN 14187-5-2016 Cold applied joint sealants - Test methods - Part 5: Determination of the resistance to hydrolysis
EN ISO 7827:2012 "Water quality - Evaluation of the ""ready""@ ""ultimate"" aerobic biodegradability of organic compounds in an aqueous medium - Method by analysis of dissolved organic carbon (DOC)"
EN 14187-5:2019 Cold applied joint sealants - Test methods - Part 5: Determination of the resistance to hydrolysis

BE-NBN

NBN-EN 25814-1992 Water quality. Quantification of dissolved oxygen. Method for electrochemical detectors (ISO 5814:1990)
NBN-EN 25813-1992 Water quality. Quantification of dissolved oxygen. Using the iodine metric method (ISO 5813:1983)
NBN 357-1954 Wastewater and Sewage, Total Plans and Solutions

Japanese Industrial Standards Committee (JISC)

JIS H 1101:1990 Methods for chemical analysis of electrolytic cathode copper
JIS H 1101:2013 Method for chemical analysis of electrolytic cathode copper
JIS K 0400-32-10:1999 Water quality -- Determination of dissolved oxygen -- Iodometric method

GOSTR

GOST 26176-2019 Fodders, mixed feeds. Methods for determination of soluble and hydrolysable carbohydrates
GOST 34430-2018 Enzyme preparations for food industry. Method for the determination of proteolitic activity

(U.S.) Joint Electron Device Engineering Council Soild State Technology Association

JEDEC JESD22-A120B-2014 Test Method for the Measurement of Moisture Diffusivity and Water Solubility in Organic Materials Used in Electronic Devices

American National Standards Institute （ANSI)

ANSI/ASTM D3240:2015 Standard Test Method for Undissolved Water In Aviation Turbine Fuels
ANSI/ASTM D3240:2010 Test Method for Undissolved Water in Aviation Turbine Fuels

International Electrotechnical Commission (IEC)

IEC 61234-1:1994 Method of test for the hydrolytic stability of electrical insulating materials; part 1: plastic films

AR-IRAM

IRAM 25 704-1963 Textile printing and dyeing auxiliaries. Enzyme activity determination method in starch hydrolysis

ESDU - Engineering Sciences Data Unit

ESDU 86011 A-1993 NUMERICAL METHODS FOR THE SOLUTION OF ORDINARY DIFFERENTIAL EQUATIONS: INITIAL VALUE PROBLEMS