laboratory compound

laboratory compound, Total:200 items.

The international standard classification for "laboratory compound" includes: Accident and disaster control , Occupational safety. Industrial hygiene , Veterinary medicine , Product and company certification. Conformity assessment .

The Chinese standard classification for "laboratory compound" includes: Labor safety technology in general , Agricultural products and feed processing machinery , Animal quarantine, veterinary and epidemic prevention , Standardization and Quality Management , Labor sanitation .

Group Standards of the People's Republic of China

T/CSCP 0035.7-2017 Laboratory corrosion tests on low alloy structural steels - Part 7: General procedures for laboratory microbial corrosion tests on low alloy structural steels
T/ACEF 001-2020 Technical guidelines for pollution prevention and control of Volatile Organic Compounds (VOCs) emission from laboratory
T/LZZLXH 034-2020 Guide for laboratory waste disposal
T/LAIA 01-2024 Green Testing Laboratory Evaluation of Chemical Testing Laboratory
T/NAHIEM 123-2024 Biosafety laboratory automation engineering design standards
T/CITS 0020-2023 Guidelines for the construction of digital laboratories
T/CPPC 1103-2025 Guidelines for Smart Construction and Evaluation of Laboratories - Part 2: Medical Laboratories
T/CCSAS 011-2021 Guidelines of safety assessment for chemistry and chemical engineering laboratories
T/NAIA 0458-2026 Specifications for Emergency Supplies in the Laboratory
T/CECS 770-2020 Engineering technical specification for physicochemical laboratory
T/GXSES 0001-2023 Management specification for processing information of laboratory waste
T/CPPC 1080.3-2024 Guidelines on construction and evaluation of smart laboratory Part 3: biosafety laboratory
T/CCSAS 005-2019 Chemical and chemical laboratory safety management regulations
T/SLEA 1011.2-2024 Technical specification of design and construction for laboratory Part 2：Chemical laboratory
T/LZZLXH 053-2021 Management Instruction for Standard Substances in Chemical Laboratory

Professional Standard - Environmental Protection

HJ/T 155-2004 The guidelines of chemical testing good laboratory practices

Professional Standard - Nuclear Industry

EJ/T 740-1992 Specifications for the design of physical and chemical laboratories in uranium mines

Sichuan Provincial Standard of the People's Republic of China

DB51/T 2155-2016 Chemical Analysis Laboratory Waste Disposal Guidelines
DB51/T 489-2015 Plant Quarantine Laboratory Management Regulations

Xizang Provincial Standard of the People's Republic of China

DB54/T 0237-2021 Chemical Analysis Laboratory Waste Management Specifications

Tianjin Provincial Standard of the People's Republic of China

DB12/T 930-2020 Guidelines for the Management of Reference Materials in Chemical Analysis Laboratories

Guangdong Provincial Standard of the People's Republic of China

DB44/T 2682-2025 Management Standards for Experimental Animals in Pathogenic Microbial Laboratories

Professional Standard - Water Conservancy

SL 463-2009 Determination of phenols in water by gas chromatography

Anhui Provincial Standard of the People's Republic of China

DB34/T 4971.2-2025 Safety management regulations for college laboratories Part 2: Chemical laboratories

Professional Standard - Supply and Marketing Cooperative

GH/T 1009-1998 Laboratory fiber blender

Professional Standard - Commodity Inspection

SN/T 4835-2017 Management requirements of biological waste from laboratory
SN/T 3591-2013 Management guide of reference material in laboratory
SN/T 5622-2023 Selection and use of reference materials in chemical analysis laboratory

Beijing Provincial Standard of the People's Republic of China

DB11/T 1736-2020 Technical specification for prevention and control of laboratory volatile organic compounds

Henan Provincial Standard of the People's Republic of China

DB4106/T 3-2019 Sampling method for animal epidemic laboratory inspection
DB4117/T 320-2021 Technical Guidelines for the Preservation and Activation of Animal Pathogenic Microbiology Laboratory Strains

Professional Standard - Agriculture

水产品质量安全检验手册 1.1.2.3-2005 Chapter 1 General Introduction Section 1 Laboratory Management 2. Basic Laboratory Requirements (3) Technical Requirements for Microbiological Laboratory Operations
水产品质量安全检验手册 1.1.2.1-2005 Chapter 1 General Introduction Section 1 Laboratory Management 2. Basic requirements of laboratories (1) General requirements for physical and chemical laboratory work
水产品质量安全检验手册 1.1.2.2-2005 Chapter 1 General Introduction Section 1 Laboratory Management 2. Basic Requirements of the Laboratory (2) General Requirements for Microbiological Laboratory Work
NY/T 541-2002 Sampling methods for laboratory investigation of animal diseases

Professional Standard - Chemical Industry

HG/T 20711-2019 Design code for heating，ventilation and air conditioning of chemical laboratory and test cabinet

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

GB 19489-2008 Laboratories - General Requirements for Biosafety
GB/T 22275.3-2008 Requirements of conduct for good laboratory practice - Part 3: Compliance of laboratory suppliers with GLP principles
GB/T 27428-2022 General requirements for plant biosafety laboratory

Yugoslav Association for Standardization

JUS U.M8.101-1984 Preparing laboratory tpecimen ofatphaltk mixtun

US Federal Contractor Registration (USFCR)

FCR UFGS-22 66 53.00 40-2011 LABORATORY CHEMICAL-WASTE AND VENT PIPING
FCR UFGS-22 66 53.00 40-2015 LABORATORY CHEMICAL-WASTE AND VENT PIPING
FCR COE EM 200-1-1-1994 VALIDATION OF ANALYTICAL CHEMISTRY LABORATORIES
FCR NE-F-2-6T-1979 QUALIFICATION AND CONTROL OF ANALYTICAL CHEMISTRY LABORATORIES FOR MIXED OXIDE FUEL ANALYSIS (INACTIVE FOR NEW DESIGN)

GB-REG

REG UFGS-22 66 53.00 40-2011 LABORATORY CHEMICAL-WASTE AND VENT PIPING

National Aeronautics and Space Administration (NASA)

NASA UFGS-22 66 53-2010 LABORATORY CHEMICAL-WASTE AND VENT PIPING

GCC Standardization Organization

GSO ISO 7787-2:2025 Dentistry — Laboratory cutters — Part 2: Carbide laboratory cutters
GSO ISO/TS 20612:2013 Water quality -- Interlaboratory comparisons for proficiency testing of analytical chemistry laboratories
GSO ISO/TR 7242:2015 Chemical analysis of light metals and their alloys -- Statistical interpretation of inter-laboratory trials
GSO ISO 7056:2007 Plastics laboratory ware - Beakers

British Standards Institution (BSI)

BS EN 12697-35:2016 Bituminous mixtures. Test methods. Laboratory mixing
BS 3286:1960 Method for laboratory evaluation of disinfectant activity of quaternary ammonium compounds by suspension test procedure
BS CWA 15793:2011 Laboratory biorisk management
13/30288546 DC BS EN 12697-32. Bituminous mixtures. Test methods for hot mix asphalt. Part 32. Laboratory compaction of bituminous mixtures by vibratory compactor
BS EN 12741:1999 Biotechnology - Laboratories for research, development and analysis - Guidance for biotechnology laboratory operations
BS ISO 16000-3:2011 Indoor air. Determination of formaldehyde and other carbonyl compounds in indoor air and test chamber air. Active sampling method
BS 60-2:1913 Report of experiments on tungsten filament glow lamps carried out by the national physical laboratory plates
BS EN 12697-35:2025 Bituminous mixtures. Test methods - Laboratory mixing
BS 7755-4.4.4:1997 Soil quality - Biological methods - Effects of pollutants on microbes - Laboratory incubation systems for measuring the mineralization of organic chemicals in soil under aerobic conditions
BS ISO 11379:1998 Textile floor coverings - Laboratory cleaning procedure using spray extraction
BS PD CEN/TS 17441:2020 Laboratory installations. Ventilation systems in laboratories

Gosstandart of Russia

GOST R 50258-1992 Complete compaund feeds for laboratory animals. Specifications
GOST 9.057-1975 Unified system of corrosion and ageing protection. Polymeric materials, wood, fabrics, paper, cardboard. Method of laboratory testing for thei stability in regards to the deterioration by rodents
GOST ISO 16000-3-2016 Indoor air. Part 3. Determination of formaldehyde and other carbonyl compounds in indoor air and test chamber air. Active sampling method

American Society for Testing and Materials (ASTM)

ASTM C1312-97(2003) Standard Practice for Making and Conditioning Chemical-Resistant Sulfur Polymer Cement Concrete Test Specimens in the Laboratory
ASTM D3668-78(1985) Standard Test Method for Bearing Ratio of Laboratory Compacted Soil-Lime Mixtures
ASTM STP 471-1970 Laboratory Handling and Storage of Peroxy Compounds
ASTM E851-81(1994)e1 Evaluating Spectrochemical Laboratory Practice
ASTM STP 578-1975 Computerized Laboratory Systems
ASTM C1312-97(2008) Standard Practice for Making and Conditioning Chemical-Resistant Sulfur Polymer Cement Concrete Test Specimens in the Laboratory
ASTM UOP547-13 Laboratory Hydrogen Sulfide and Mercaptan Extraction

European Committee for Standardization (CEN)

EN 12697-35:2016 Bituminous mixtures - Test methods - Part 35: Laboratory mixing
PREN 12697-32-2017 Bituminous mixtures - Test methods - Part 32: Laboratory compaction of bituminous mixtures by vibratory compactor
EN ISO 15473:2020 Soil quality - Guidance on laboratory testing for biodegradation of organic chemicals in soil under anaerobic conditions (ISO 15473:2002)
EN 12697-32:2019 Bituminous mixtures - Test methods - Part 32: Specimen preparation by vibratory compactor
EN 12741:1999 Biotechnology - Laboratories for research, development and analysis - Guidance for biotechnology laboratory operations

German Institute for Standardization

DIN ISO 15473:2002 Soil quality - Guidance on laboratory testing for biodegradation of organic chemicals in soil under anaerobic conditions (ISO 15473:2002)
DIN EN 12697-35:2023 Bituminous mixtures - Test methods - Part 35: Laboratory mixing; German and English version prEN 12697-35:2023
DIN EN 12697-35:2016-10 Bituminous mixtures - Test methods - Part 35: Laboratory mixing; German version EN 12697-35:2016
DIN EN 12697-32:2017 Bituminous mixtures - Test methods - Part 32: Laboratory compaction of bituminous mixtures by vibratory compactor; German and English version prEN 12697-32:2017
DIN EN 12697-35 E:2002-05 Bituminous mixtures - Test methods - Part 35: Laboratory mixing
DIN EN ISO 15473 E:2020-02 Guidelines for laboratory testing of biodegradability of organic compounds in soil under anaerobic conditions (draft)
DIN EN 12697-35 E:2014-11 Bituminous mixtures - Test methods - Part 35: Laboratory mixing
DIN 19684-9:1977 Methods of soil investigations for agricultural engineering; chemical laboratory tests, determination of the plant detrimental sulphides and poly sulphides in the soil
DIN EN 14727:2006-03 Laboratory furniture - Storage units for laboratories - Requirements and test methods
DIN EN 12697-32 E:2017 Draft Document - Bituminous mixtures - Test methods - Part 32: Laboratory compaction of bituminous mixtures by vibratory compactor; German and English version prEN 12697-32:2017
DIN EN ISO 7787-2:2020-06 Dentistry - Laboratory cutters - Part 2: Carbide laboratory cutters (ISO 7787-2:2020); German version EN ISO 7787-2:2020
DIN EN 12697-35:2007 Bituminous mixtures - Test methods for hot mix asphalt - Part 35: Laboratory mixing; German version EN 12697-35:2004+A1:2007
DIN EN 12741:1999-10 Biotechnology - Laboratories for research, development and analysis - Guidance for biotechnology laboratory operations; German version EN 12741:1999
DIN EN 12697-35 E:2014 Draft Document - Bituminous mixtures - Test methods - Part 35: Laboratory mixing; German version prEN 12697-35:2014
DIN EN 12741:1999 Biotechnology - Laboratories for research, development and analysis - Guidance for biotechnology laboratory operations; German version EN 12741:1999
DIN ISO 14239:2018-06 Soil quality - Laboratory incubation systems for measuring the mineralization of organic chemicals in soil under aerobic conditions
DIN ISO 14239 E:2016-08 Soil quality - Laboratory incubation systems for measuring the mineralization of organic chemicals in soil under aerobic conditions
DIN ISO 14239:1999 Soil quality - Laboratory incubation systems for measuring the mineralization of organic chemicals in soil under aerobic conditions (ISO 14239:1997)

Standards Institution of Israel

S.I.335/1-1972 DEMINERALISED WATER FOR LABORATORY USE

Association Francaise de Normalisation

NF EN 12697-35:2017 Bituminous mixtures - Tests - Part 35: laboratory mixing
NF P98-818-35*NF EN 12697-35:2017 Bituminous mixtures - Test methods - Part 35 : Laboratory mixing
NF EN ISO 22367:2020 Medical biology laboratories - Application of risk management to medical biology laboratories
NF EN ISO 7787-2:2020 Oral medicine - Laboratory burs - Part 2: carbide laboratory burs
NF EN 12741:1999 Biotechnology - Research, Development and Analysis Laboratories - Guide for Biotechnology Laboratory Operations
NF P98-818-32/IN1:2007 Bituminous mixtures - Test methods for hot mix asphalt - Part 32 : laboratory compaction of bituminous mixtures by vibratory compactor.
NF P98-125:2009 Road foundations - Untreated sand-gravel mix - Methodology for laboratory study.
NF X42-053*NF EN 12741:1999 Biotechnology. Laboratories for research, development and analysis. Guidance for biotechnology laboratory operations.
CWA 15793:2011 Laboratory biorisk management
NF P98-818-35:2007 Bituminous mixtures - Test methods for hot mix asphalt - Part 35 : laboratory mixing.
NF P98-818-32:2007 Bituminous mixtures - Test methods for hot mix asphalt - Part 32 : laboratory compaction of bituminous mixtures by vibratory compactor.
NF S91-116-2*NF EN ISO 7787-2:2020 Dentistry - Laboratory cutters - Part 2 : carbide laboratory cutters
NF P98-818-35/IN1:2007 Bituminous mixtures - Test methods for hot mix asphalt - Part 35 : laboratory mixing.
NF EN ISO 7787-3:2017 Oral medicine - Laboratory burs - Part 3: carbide laboratory burs for milling machines
NF EN ISO 9142:2004 Adhesives - Guide for the selection of normal laboratory aging test conditions for bonded assemblies
XP X15-300*XP CEN/TS 17441:2020 Laboratory installations - Ventilation systems in laboratories

Military Standards (MIL-STD)

DOD A-A-53536-1988 EMBEDDING COMPOUND, LABORATORY (PARAFFIN AND PLASTIC POLYMERS)

Finnish Standards Institute

SFS-EN ISO 7787-2:2020 Dentistry. Laboratory cutters. Part 2: Carbide laboratory cutters (ISO 7787-2:2020)

Standard Association of Australia （SAA）

AS 2243.2:1982 Safety in laboratories - Chemical
AS 2243.3:1985 Safety in laboratories - Microbiology
AS 2243.2:1990 Safety in laboratories - Chemical aspects
AS 2243.3:1991 Safety in laboratories - Microbiology
AS 4180.1:1994 Drift loss from cooling towers - Laboratory measurement - Chloride balance method
AS 2243.10:1993 Safety in laboratories - Storage of chemicals
AS 4125.1:2009 Good Laboratory Practice for Food and Water Microbiology Laboratories Site, Safety, Sample Management, Compliance and Records Management
AS 2243.2:1979 Code of practice for safety in laboratories - Chemical

Swedish Institute for Standards

SS-EN 15002:2006 Characterization of waste - Preparation of test portions from the laboratory sample
SS-EN 14727:2005 Laboratory furniture - Storage units for laboratories - Requirements and test methods
SS-EN 12741:1999 Biotechnology - Laboratories for research, development and analysis - Guidance for biotechnology laboratory operations

Korean Agency for Technology and Standards (KATS)

KS I ISO 15473:2009 Soil quality-Guidance on laboratory testing for biodegradation of organic chemicals in soil under anaerobic conditions
KS I ISO TS 20612-2019 Water quality — Interlaboratory comparisons for proficiency testing of analytical chemistry laboratories
KS I ISO TS 20612:2019 Water quality — Interlaboratory comparisons for proficiency testing of analytical chemistry laboratories
KS I ISO TS 20612-2024 Water quality — Interlaboratory comparisons for proficiency testing of analytical chemistry laboratories
KS I ISO/TS 20612-2024 Water quality — Interlaboratory comparisons for proficiency testing of analytical chemistry laboratories
KS P ISO 7787-2-2021 Dentistry — Laboratory cutters —Part 2: Carbide laboratory cutters
KS I ISO 20612:2009 Water quality－Interlaboratory comparisons for proficiency testing of analytical chemistry laboratories
KS P ISO 7787-2:2021 Dentistry — Laboratory cutters —Part 2: Carbide laboratory cutters
KS K ISO 11379:2011 Textile floor coverings－Laboratory cleaning procedure using spray extraction
KS M ISO 9142-2022 Adhesives－Guide to the selection of standard laboratory ageing conditions for testing bonded joints
KS D ISO 7242-2006(2016) Chemical analysis of light metals and their alloys－Statistical interpretation of inter-laboratory trials

American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)

ASHRAE LO-09-076-2009 The Role of Plants in the Reduction of Heat Flux through Green Roofs: Laboratory Experiments
ASHRAE NO-94-29-1994 Validation of Pharmaceutical Clinical Supply Laboratories
ASHRAE NO-94-18-1994 Biological Laboratories: Hoods@ Exhaust@ and Supply Systems

The Directorate General of Specifications and Metrology (DGSM)

OS GSO ISO/TS 20612:2013 Water quality -- Interlaboratory comparisons for proficiency testing of analytical chemistry laboratories

Ente Nazionale Italiano di Unificazione

UNI 2750:1945 Chemical laboratory glassware. Desiccators
UNI EN ISO 7787-2:1998 Dental rotary instruments - Cutters - Carbide laboratory cutters.
UNI 957:1939 Chemical laboratory glass. Crystallizers
UNI SPERIMENTALE 2896:1945 Chemical laboratory equipment. Fork.
UNI 2743:1945 Chemical laboratory glassware. Closed coil condensers
UNI EN 12741:2001 Biotechnology - Laboratories for research, development and analysis - Guidance for biotechnology laboratory operations
UNI EN ISO 7787-2:2020 Dentistry - Laboratory cutters - Part 2: Carbide laboratory cutters
UNI SPERIMENTALE 2889:1945 Chemical laboratory equipment. Tripod stands.
UNI EN ISO 7787-2:2001 Dental rotary instruments - Cutters - Carbide laboratory cutters
UNI SPERIMENTALE 2195:1943 Chemical laboratory glassware. Drying towers
UNI 2896-1945 Chemistry laboratory equipment. fork
UNI 2738:1945 Chemical laboratory glassware. Distillation flasks
UNI 2743-1945 Glass products for chemical laboratories. Serpentine cooler, closed
UNI SPERIMENTALE 2892:1945 Chemical laboratory equipment. Clamps for stands.
UNI SPERIMENTALE 2890:1945 Chemical laboratory equipment. Tripods.
UNI 2751:1945 Chemical laboratory glasses. Washing bottles
UNI 2890-1945 Chemistry laboratory equipment. tripod
UNI 2082:1942 Chemical laboratory glassware. Three-way tap, capillary
UNI 969:1939 Chemical laboratory glassware. Short stem funnels
UNI 2745:1945 Chemical laboratory glassware. Weighing filters, tall
UNI 957-1939 Glass for chemical laboratories. crystallizer

International Organization for Standardization (ISO)

ISO 15473:2002 Soil quality - Guidance on laboratory testing for biodegradation of organic chemicals in soil under anaerobic conditions
ISO/TS 20612:2007 Water quality - Interlaboratory comparisons for proficiency testing of analytical chemistry laboratories

Indonesia Standards

SNI 8183:2017 Furniture – Chemistry Laboratory Table

Magyar Szabványügyi Testület

MNOSZ 6649-1952 Lab Item Container Ring

Comitato Elettrotecnico Italiano

CEI EN 60477-2:1997 Resistori da laboratorio - Parte 2: Resistori da laboratorio per corrente alternata

Danish Standards Foundation

DANSK DS/EN 12697-35:2016 Bituminous mixtures - Test methods - Part 35: Laboratory mixing
DANSK DS/EN 12741:1999 Biotechnology - Laboratories for research, development and analysis - Guidance for biotechnology laboratory operations
DS/CWA 15793:2011 Laboratory biorisk management
DANSK DS/ISO 7787-2:2020 Dentistry – Laboratory cutters – Part 2: Carbide laboratory cutters
DS/EN 12741:2000 Biotechnology - Laboratories for research, development and analysis - Guidance for biotechnology laboratory operations
DANSK DS/CEN/TS 17441:2020 Laboratory installations – Ventilation systems in laboratories

Standards Norway

NS-EN 12697-35:2016 Bituminous mixtures - Test methods - Part 35: Laboratory mixing
NS-EN 12741:1999 Biotechnology — Laboratories for research, development and analysis — Guidance for biotechnology laboratory operations
SN-CWA 15793:2011 Laboratory biorisk management
SN-CEN/TS 17441:2020 Laboratory installations — Ventilation systems in laboratories

National Fire Protection Association (NFPA)

NFPA 1H PART 3 CHAPTER 26-2003 Laboratories Using Chemicals

Bureau of Indian Standards

IS 4209-2013 Chemical Laboratories - Code of Safety
IS 4209-1966 Chemistry Laboratory Safety Code
IS 12035-1986 Code of Safety in Microbiological Laboratories
IS 4906-1968 Radiochemistry Laboratory Safety Practices

Spanish Association for Standardization (UNE)

UNE-EN ISO 7787-2:2020 Dentistry - Laboratory cutters - Part 2: Carbide laboratory cutters (ISO 7787-2:2020)
UNE-EN 12741:2000 Biotechnology - Laboratories for research, development and analysis - Guidance for biotechnology laboratory operations
AENOR UNE-CWA 15793:2013 Biological risk management in the laboratory.
AENOR UNE 77332:2003 Soil quality. Laboratory incubation systems for measuring the mineralization of organic compounds present in the soil under aerobic conditions.

Lithuanian Standards Office

LST EN 12741-2000 Biotechnology - Laboratories for research, development and analysis - Guidance for biotechnology laboratory operations

Underwriter Laboratories of Canada (ULC)

CAN/ULC-S774-09(2019) Standard guide for laboratory determination of volatile organic compound emissions from polyurethane foams
ULC CAN/ULC-S774:2020 GUIDE STANDARD FOR LABORATORY EVALUATION OF VOLATILE ORGANIC COMPOUND EMISSIONS FROM POLYURETHANE FOAM
CAN/ULC-S774-2003 STANDARD LABORATORY GUIDE FOR THE DETERMINATION OF VOLATILE ORGANIC COMPOUND EMISSIONS FROM POLYURETHANE FOAM

COMMISSION FOR THE STANDARDS, METROLOGY AND QUALITY OF VIETNAM (STAMEQ)

TCVN 6865-2001 Soil quality.Laboratory incubation systems for measuring the mineralization of organic chemicals in soil under aerobic conditions

Clinical and Laboratory Standards Institute

CLSI GP05-A3-2011 Clinical Laboratory Waste Management; Approved Guideline—Third Edition

American Water Works Association (AWWA)

AWWA WSC70019 Laboratory Emergency Response: Screening of Unknown Contaminants in the Field and in the Lab
AWWA ACE63051 Performance of Plastic Pipes and Pipe Gaskets in Hydrocarbon Contamination: Field Experience and Laboratory Studies

National Association of Corrosion Engineers (NACE)

NACE Paper 14754-2020 A new laboratory method for rapid screening of halide inhibitors

GM Holden Ltd

HOLDEN HN 1776-2012 PVC Compounds for Interior Use
HOLDEN HN 1776-2000 PVC Compounds for Interior Use

American Petroleum Institute (API)

API REPORT 83-50-1985 Interlaboratory and Intralaboratory Comparision of the API Drilling Fluids Bioassay Protocol

National Standardisation Body (ASRO)

STAS 11350-1979 Textiles LABORATORY SAMPLING AND SPECIMENS PREPARATION FOR CHEMICAL ANALYSIS

Japanese Industrial Standards Committee (JISC)

JIS A 1171:1978 Method of making test sample of polymer-modified mortar in the laboratory
JIS K 6877:2010 Adhesives-Guide to the selection of standard laboratory ageing conditions for testing bonded joints

Universal Oil Products Company (UOP)

UOP 547-2013 LABORATORY HYDROGEN SULFIDE AND MERCAPTAN EXTRACTION