Fluoride ion electrode activation method

Fluoride ion electrode activation method, Total:164 items.

The international standard classification for "Fluoride ion electrode activation method" includes: Workplace atmospheres , Metalliferous minerals , Water quality , Non-metalliferous minerals , Fertilizers , Ambient atmospheres , Other non-ferrous metals and their alloys , Lead, zinc, tin and their alloys , Inorganic chemicals in general , Animal feeding stuffs , Iron ores , Cadmium, cobalt and their alloys , Fissile materials , Testing of metals , Tea , Medical Sciences and health care facilities in general , Other metalliferous minerals , Copper and copper alloys , Liquid wastes. Sludge , Production of metals , Iron and steel castings , Materials for aerospace construction .

The Chinese standard classification for "Fluoride ion electrode activation method" includes: Labor sanitation , Iron ore , Analysis methods for toxic substances in water , Heavy metal ore , Building material raw material ore , Analysis methods for environmental quality of soils , Basic standards and general methods on chemical fertilizers , Analysis methods for toxic substances in atmosphere , Rare scattered metals and their alloys , Heavy metals and their alloys analysis method , Inorganic chemicals in general , Livestock and poultry feed and additive , Rare metals and their alloys analysis method , Rare light metals and their alloys , Nuclear material, nuclear fuel and their analytical test method , Semimetal and semiconductor material analysis method , Tea products , Hydrogeological survey , Diagnostic standard for public nuisance diseases , Analysis methods for exhaust emission pollutants , Light metals and their alloys analysis method , Rare metal ore , Metallurgy material and auxiliary material in general , Light metal ore , Chemical equipment , Technical Management .

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

GB/T 21057-2007 Inorganic chemicals for industrial use—General method for determination of fluorine content—Ion selective electrode method
GB/T 20166.2-2006 Chemical analysis methods of rare earth polishing powder - Determination fluorine content Ion selective electrode analysis
GB/T 23273.6-2009 Methods for chemical analysis of cobalt oxalate - Part 6: Determination of chlorine ion content - Ion selective electrode method
GB/T 15555.11-1995 Solid waste - Determination of fluoride - Ion selective electrode method
GB/T 14506.12-1993 Sillicate rocks. Determination of fluorine content. Ion selective electrode method
GB/T 12690.16-2010 Chemical analysis methods of non-rare earth impurities in rare earth metals and the oxides—Part 16:Determination of fluorine content—Ion selective electrode analysis
GB/T 22104-2008 Soil quality - Analysis of fluoride - Ion selective electrometry
GB/T 3884.5-2012 Methods for chemical analysis of copper concentrates - Part 5: Determination of fluoride content - Ion selective electrode method
GB/T 3885.10-1983 Methods for chemical analysis of spodumenite and lepidolite concentrates;The ion selective electrode method for the determination of fluorine content in lepidolite concentrates
GB/T 23513.4-2009 Chemical analysis methods for germanium concentrate—Part 4:Determination of fluoride content—ISE
GB/T 15433-1995 Ambient air－Determination of the fluoride－Method by lime-paper sampling and fluorine ion-selective electrode analysis
GB/T 6730.28-1986 Methods for chemical analysis of iron ores; The ion-selective electrode method for the determination of fluorine content
GB/T 32954-2016 Fertilizers - Determination of fluoride - Ion - selective electrode method
GB/T 16030-1995 Workplace air―Determination of hydrogen fluoride and fluorides―Ion selective electrode method
GB/T 8151.9-1987 Methods for chemical analysis of zinc concentrates--The ion selective electrode method for the determination of fluorine content
GB/T 8151.9-2012 Methods for chemical analysis of zinc concentrates—Part 9:Determination of fluorine content—The ion selective electrode method
GB/T 15434-1995 Ambient air－Determination of the mass concentration of fluoride－Method by filter sampling and fluorine ion-selective electrode analysis
GB/T 42276-2022 Determination of fluorine ion and chloride ion in silicon nitride powder—Ion chromatography method
GB/T 11844-2015 Determination of fluorine and chlorine in uranium dioxide powder and pellets―Pyrohydrolysis ion-selective electrode method
GB/T 11844-1989 Uranium dioxide powder and pellets - Determination of fluorine - Pyrohydrolysis ion-selective electrode method
GB/T 11064.15-1989 Lithium carbonate-Determination of fluoride content-Ion selective electrode method
GB 11848.6-1989 Determination of Fluorine in Uranium Ore Concentrates by Ion Selective Electrode Method
GB/T 1819.15-2006 Methods for chemical analysis of tin concentrates―Determination of fluorine content―The ion-selective electrode method
GB/T 7484-1987 quality - Determination of fluoride - Ion selective electrode method
GB/T 11848.6-1989 Determination of fluoide in uranium ore concentrate by ion-selective electrode
GB/T 11064.15-2013 Methods for Chemical Analysis of Lithium Carbonate, Lithium Hydroxide Monohydrate and Lithium Chloride - Part 15: Determination of Fluoride Content - Ion Selective Method
GB/T 20166.2-2012 Chemical analysis methods of rare earth polishing powder - Part 2: Determination fluorine content - Ion selective electrode analysis
GB/T 6730.28-2006 Iron ores―Determinaton of fluorine content―Ion-selective electrode method
GB/T 13083-2002 Determination of fluorine in feed--Ion selective electrode method

Professional Standard - Agriculture

NY/T 838-2004 Test method of Fluorine in tea -- Electrode method for selection of Fluorine ion

Professional Standard - Geology

DZ/T 0279.21-2016 Analysis methods for regional geochemical sample. Part 21: Determination of fluorine contents by ion selective electrode
DZ/T 0064.54-1993 Groundwater quality test methods - the determination of fluoride with Ion selective electrode method
DZ/T 0064.54-2021 Methods for analysis of groundwater quality- Part 54: Determination of fluoride- Ion-selective electrode method

中华人民共和国环境保护部

GB 7484-1987 Water quality-Determination of fluoride-Ion selective electrode method

Professional Standard - Hygiene

WS/T 30-1996 Urine - Determination of cadmium - Flame atomic absorption spectrometric method
WS/T 89-1996 Determination of fluorine in urine.Ion selective electrode method
WS/T 88-2012 Method for determination of total fluoride in coal and soil—Pyrohydrolysis-ion selective electrode method

Shandong Provincial Standard of the People's Republic of China

DB37/T 2655-2015 Determination of Hydrochloric Acid Fluoride by Ion Selective Electrode Method
DB37/T 2653-2015 Determination of Fertilizer Fluoride by Ion Selective Electrode Method

中华人民共和国国家卫生和计划生育委员会

WS/T 212-2001 Determination for fluoride in serum.Ion selective electrode method
WS/T 89-2015 Determination of fluoride in urine―Ion selective electrode method
WS/T 88-1996 Method for determination of total fluorine in coal and soil - Combustion-hydrolysis-ion selective electrode method

Professional Standard - Environmental Protection

HJ/T 67-2001 Stationary source emission -- Determination of fluoride -- Ion selective electrode method
HJ 873-2017 Soil - Determination of water soluble fluoride and total fluoride - Ion selective electrode method
HJ 955-2018 Ambient air - Determination of fluoride - Filter sampling / fluoride ion-selective electrode method
HJ 480-2009 Ambient air - Determination of the fluoride - Filter sampling followed by fluorine ion-selective electrode method
HJ 955-2018 Ambient air - Determination of fluoride - Filter sampling / fluoride ion-selective electrode method
HJ 999-2018 Solid waste - Determination of fluoride - Alkali fusion-ion selective electrode method
HJ 481-2009 Ambient air - Determination of the fluoride - Lime-paper sampling followed by fluorine ion-selective electrode method

Professional Standard - Urban Construction

CJ/T 62-1999 Municipal sewage.Determination of flouride.Ion selective electrode method
CJ 26.12-1991 Municipal sewage water quality inspection method standard fluoride determination ion selective electrode method

Professional Standard - Non-ferrous Metal

YS/T 254.5-2011 Methods for chemical analysis of beryllium concentrate and beryl—Part 5:Determination of fluorine content—Ion selective electrode method
YS/T 1658.3-2023 Methods for chemical analysis of crude nickel cobalt hydroxide— Part 3：Determination of fluorine content— Ion selective electrode method
YS/T 743-2010 Determination of gaseous flouride in purification system for electrolyzed aluminium by alkali-paper sampling and fluorine ion-selective electrode analysis
YS/T 509.10-2006 Methods for chemical analysis of sqodumenite and lepidolite concentrates The ion selective electrode method for the determination of fluorine content in lepidolite concentrates
YS/T 509.9-2008 Methods for chemical analysis of spodumene and lepidolite concentrates-Determination of fluorine content-lon selective electrode method
YS/T 1593.3-2023 Methods for chemical analysis of crude lithium carbonate—Part 3：Determination of fluoride ion content—Ion selective electrode method
YS/T 990.5-2014 Methods for chemical analysis of copper matte―Part 5:Determination of fluorine content―Ion-selective electrode method
YS/T 254.5-1994 Methods for chemical analysis of beryllium concentrates-beryl The ion selective electrode method for the determination of fluorine content

Professional Standard - Ferrous Metallurgy

YB/T 190.10-2014 Continuous casting mold powder. The determination of fluorine content. The ion selective electrode method
YB/T 190.10-2001 Methods for chemical analysis of continuous casting mold powder—The ion-selective electrode method for the determination of fluorine content

Group Standards of the People's Republic of China

T/CQEEMA 8-2023 Water quality, determination of fluoride, ion-selective electrode (ISE) automatic analyzer method
T/HNNMIA 47-2023 Chemical analysis methods for ammonium molybdate - Determination of fluorine content - Ion selective electrode method
T/QAS 084-2023 Determination of Fluorine in Brine by Ion Selective Electrode Method
T/SCS 000011-2021 Determination of fluorine in boron carbide -aluminum oxide pellets by pyrohydrolysis-ion chromatography
T/QAS 082.8-2023 Chemical Analysis of Rock Salt and Glauber's Salt Part 8: Determination of Fluorine by Ion Selective Electrode Method
T/CEC 771-2023 Determination of fluoride in flue gas from coal-fired power plants using ion-selective electrode method

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 34500.1-2017 Chemical analysis methods for rare earth residue and waste water - Part 1: Determination of fluorine content - Ion selective electrode analysis
GB/T 1819.15-2017 Methods for chemical analysis of tin concentrates - Part 15: Determination of fluorine content - The ion-selective electrode method

Professional Standard - Chemical Industry

HG/T 4592-2014 Electrode active coating of dimensionally stable anode electrolyzer use membrane method

工业和信息化部

YS/T 1171.4-2017 Methods for chemical analysis of regenerated zinc material一Part 4:Determination of fluorine content-The ion selective electrode method
SJ/T 11793-2022 Test method for electrochemical properties of electrode materials used in lithium ion battery
YS/T 1115.13-2016 Methods for chemical analysis of copper ores and tailings Part 13: Determination of fluorine content Ion-selective electrode method and ion chromatography
SJ/T 11794-2022 Test method for unbonded lithium of cathode materials used in lithium ion battery
YS/T 1179.1-2017 Chemical analysis methods of aluminum slag-Part 1:Determination of fluorine in aluminum slag-Ion selective electrode method
YS/T 1057.2-2020 Methods for chemical analysis of cobaltosix oxide-Part 2 : Determination of chloride content-Ion selective electrode method

Professional Standard - Electron

SJ/T 10904-1996 Determination of fluorine in electronic glass - Specific ion electrode methods

国家市场监督管理总局、中国国家标准化管理委员会

GB/T 6730.28-2021 Iron ores—Determination of fluorine content—Ion-selective electrode method
GB/T 13083-2018 Determination of fluorine in feeds—Ion selective electrode method

未注明发布机构

ANSI/ADA 171-2019*ISO 19448 Analysis of Fluoride Concentration in Aqueous Solutions by Use of Fluoride Ion-Selective Electrode
ASTM RR-C16-1015 1993 C0871-Test Methods for Chemical Analysis of Thermal Insulation Materials for Leachable Chloride, Fluoride, Silicate, and Sodium Ions
ASTM RR-C16-1026 2004 C0871-Test Methods for Chemical Analysis of Thermal Insulation Materials for Leachable Chloride, Fluoride, Silicate, and Sodium Ions
DIN EN ISO 19448 E:2016-07 Analysis of fluoride concentration in aqueous solutions using fluoride ion-selective electrodes in dentistry (draft)

Professional Standard - Commodity Inspection

SN/T 3469.2-2013 Determination of flurine in import copper matte or sintered copper material by ion - Selective electrode
SN/T 3014-2011 Determination of Fluorine and Chlorine Contents in Chrome Ores for Import and Export. Ion Selective Electrode Method
SN/T 3996-2014 Determination of fluoride content in calcined magnesite - Ion selective electrode method
SN/T 4779.1-2017 Determination of fluoride in bottled water for export—Method by ion selective electrode flow injection analysis

Taiwan Provincial Standard of the People's Republic of China

CNS 12508-1989 General Rules Ion-Selective Electrode Method

Professional Standard - Rare Earth

XB/T 612.4-2023 Chemical analysis methods of scraps of neodymium iron boron —Part 4：Determination of fluorine content —Ion selective electrode method

Jilin Provincial Standard of the People's Republic of China

DB22/T 2910-2018 Determination of fluorine content in imported coal by alkali fusion-fluorine ion selective electrode method

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

GJB 533.12-1988 Detection methods for 45 components of submarine cabin air. Determination of hydrogen fluoride content. Ion-selective electrode method.

Professional Standard - Aviation

HB 5220.41-2008 Methods for Chemical Analysis of Superalloys - Part 41: Determination of Boron Content by Fluoroborate Ion Selective Electrode Method

Anhui Provincial Standard of the People's Republic of China

DB34/T 2127.10-2014 Analytical methods for samples from regional geochemical surveys - Part 10: Determination of fluorine content by the ion selective electrode method

Professional Standard - Nuclear Industry

EJ/T 1212.9-2008 Test methods for analysis of sintered gadolinium oxide-uranium dioxide pellets.Part9: Determination of fluorine by pyrohydrolysis ion-selective electrode method

Hebei Provincial Standard of the People's Republic of China

DB13/T 5426-2021 Determination of Fluorine Content in Mold Flux and Furnace Slag Ion Selective Electrode Method

Inner Mongolia Provincial Standard of the People's Republic of China

DB15/T 688.3-2014 Methods for Chemical Analysis of Thorium Dioxide Powder Part 3: Determination of Fluorine in Thorium Dioxide Powder—Pyrohydrolysis Ion Selective Electrode Method

International Organization for Standardization (ISO)

ISO 19448:2018 Dentistry - Analysis of fluoride concentration in aqueous solutions by use of fluoride ion-selective electrode
ISO/CD 13548 Copper, lead and zinc sulfide concentrates — Determination of fluorine content by sodium hydroxide fusion and fluoride ion selective electrode detection
ISO 4694:1987 Iron ores; Determination of fluorine content; Ion-selective electrode method

European Committee for Standardization (CEN)

EN ISO 19448:2018 Dentistry - Analysis of Fluoride Concentration in Aqueous Solutions by use of Fluoride-Ion Selective Electrode

British Standards Institution (BSI)

BS 7020-19:1989 Analysis of iron ores. Method for the determination of fluorine content. Ion-selective electrode method
BS 7020-19:1988 Analysis of iron ores. Method for the determination of fluorine content. Ion-selective electrode method
BS EN ISO 19448:2018 Dentistry. Analysis of fluoride concentration in aqueous solutions by use of fluoride ion-selective electrode
BS EN 16279:2012 Animal feeding stuffs. Determination of fluoride content after hydrochloric acid treatment by ion-sensitive electrode method (ISE)

YU-JUS

JUS H.Z1.142-1984 Testing of industrial waters. Detarmination of fluoride by ion selective etectrode

SCC

ADA 171-2019 Analysis of Fluoride Concentration in Aqueous Solutions by Use of Fluoride Ion-Selective Electrode
DANSK DS/ISO 4694:2011 Iron ores - Determination of fluorine content - Ion-selective electrode method
NS-EN 16279:2012 Animal feeding stuffs — Determination of fluoride content after hydrochloric acid treatment by ion-sensitive electrode method (ISE)
NS-EN ISO 19448:2018 Dentistry — Analysis of Fluoride Concentration in Aqueous Solutions by use of Fluoride-Ion Selective Electrode (ISO 19448:2018)
DANSK DS/EN 16279:2012 Animal feeding stuffs - Determination of fluoride content after hydrochloric acid treatment by ion-sensitive electrode method (ISE)
DANSK DS/EN ISO 19448:2018 Dentistry – Analysis of Fluoride Concentration in Aqueous Solutions by use of Fluoride-Ion Selective Electrode (ISO 19448:2018)
AWWA WQTC65960 Fluoride Testing Method: Improving Ion Chromatography Accuracy
DIN EN ISO 19448 E:2016 Draft Document - Dentistry - Analysis of Fluoride Concentration in Aqueous Solutions by use of Fluoride-Ion Selective Electrode (ISO/DIS 19448:2016); German and English version prEN ISO 19448:2016
DIN EN 16279 E:2011 Draft Document - Animal feeding stuffs - Determination of fluoride content after hydrochloric acid treatment by ion-sensitive electrode method (ISE); German version prEN 16279:2011

GSO

GSO ISO 4694:2013 Iron ores -- Determination of fluorine content -- Ion-selective electrode method
BH GSO ISO 19448:2022 Dentistry — Analysis of fluoride concentration in aqueous solutions by use of fluoride ion-selective electrode
GSO ISO 19448:2021 Dentistry — Analysis of fluoride concentration in aqueous solutions by use of fluoride ion-selective electrode
OS GSO ISO 9892:2016 Uranium metal, uranium dioxide powder and pellets, and uranyl nitrate solutions -- Determination of fluorine content -- Fluoride ion selective electrode method
GSO ISO 9892:2016 Uranium metal, uranium dioxide powder and pellets, and uranyl nitrate solutions -- Determination of fluorine content -- Fluoride ion selective electrode method
BH GSO ISO 9892:2017 Uranium metal, uranium dioxide powder and pellets, and uranyl nitrate solutions -- Determination of fluorine content -- Fluoride ion selective electrode method

Association Francaise de Normalisation

NF A20-428*NF ISO 4694:1987 Iron ores. Determination of fluorine content. Ion-selective electrode method.
NF V18-252*NF EN 16279:2012 Animal feeding stuffs - Determination of fluoride content after hydrochloric acid treatment by ion-sensitive electrode method (ISE).
NF M03-064:2002 Solid mineral fuels - Determination of total fluorine by combustion with an oxygen bomb - Specific electrode method for fluoride ions
NF EN ISO 19448:2018 Oral medicine - Analysis of fluoride concentration in aqueous solutions using a fluoride ion selective electrode
NF S91-275*NF EN ISO 19448:2018 Dentistry - Analysis of fluoride concentration in aqueous solutions by use of fluoride-ion selective electrode
NF EN 16279:2012 Animal feed - Determination of fluoride content, after treatment with hydrochloric acid, using the ion selective electrode (ISE) method

Danish Standards Foundation

DS/ISO 4694:2011 Iron ores - Determination of fluorine content - Ion-selective electrode method
DS/EN 16279:2012 Animal feeding stuffs - Determination of fluoride content after hydrochloric acid treatment by ion-sensitive electrode method (ISE)

American Society for Testing and Materials (ASTM)

ASTM D4765-13 Standard Test Method for Measurement of Fluorides in Workplace Atmospheres by Ion-Selective Electrodes
ASTM D1179-99 Standard Test Methods for Fluoride Ion in Water
ASTM D4765-13(2018) Standard Test Method for Measurement of Fluorides in Workplace Atmospheres by Ion-Selective Electrodes
ASTM UOP975-01 Fluorine in Liquid Hydrocarbons and LPG by Oxidative Combustion with Ion-Selective Electrode Detection
ASTM UOP912-06 Fluoride in Catalysts, Molecular Sieves, and Aqueous Solutions by Ion Selective Electrode
ASTM D1179-04 Standard Test Methods for Fluoride Ion in Water
ASTM D1179-10 Standard Test Methods for Fluoride Ion in Water
ASTM UOP912-94 Fluoride in Catalysts, Molecular Sieves, and Aqueous Solutions by Ion Selective Electrode
ASTM D5987-96(2002) Standard Test Method for Total Fluorine in Coal and Coke by Pyrohydrolytic Extraction and Ion Selective Electrode or Ion Chromatograph Methods
ASTM D5987-96 Standard Test Method for Total Fluorine in Coal and Coke by Pyrohydrolytic Extraction and Ion Selective Electrode or Ion Chromatograph Methods
ASTM D5987-96(2007) Standard Test Method for Total Fluorine in Coal and Coke by Pyrohydrolytic Extraction and Ion Selective Electrode or Ion Chromatograph Methods
ASTM D1179-16 Standard Test Methods for Fluoride Ion in Water
ASTM D3761-10 Standard Test Method for Total Fluorine in Coal by the Oxygen Bomb Combustion/Ion Selective Electrode Method
ASTM D3761-96(2002) Standard Test Method for Total Fluorine in Coal by the Oxygen Bomb Combustion/Ion Selective Electrode Method
ASTM D3761-96 Standard Test Method for Total Fluorine in Coal by the Oxygen Bomb Combustion/Ion Selective Electrode Method
ASTM C871-08 Standard Test Methods for Chemical Analysis of Thermal Insulation Materials for Leachable Chloride, Fluoride, Silicate, and Sodium Ions
ASTM C871-95(2000) Standard Test Methods for Chemical Analysis of Thermal Insulation Materials for Leachable Chloride, Fluoride, Silicate, and Sodium Ions
ASTM D5987-96(2015) Standard Test Method for Total Fluorine in Coal and Coke by Pyrohydrolytic Extraction and Ion Selective Electrode or Ion Chromatograph Methods

Korean Agency for Technology and Standards (KATS)

KS E ISO 4694:2003 Iron ores－Determination of fluorine content－Ion-selective electrode method
KS E ISO 4694-2003(2019) Iron ores－Determination of fluorine content－Ion-selective electrode method
KS E ISO 4694-2019 Iron ores－Determination of fluorine content－Ion-selective electrode method
KS A ISO 9892-2022 Uranium metal, uranium dioxide powder and pellets, and uranyl nitrate solutions－Determination of fluorine content－Fluoride ion selective electrode method
KS P ISO 19448:2021 Dentistry — Analysis of fluoride concentration in aqueous solutions by use of fluoride ion-selective electrode
KS A ISO 9892-2012(2017) Uranium metal, uranium dioxide powder and pellets, and uranyl nitrate solutions－Determination of fluorine content－Fluoride ion selective electrode method
KS A ISO 9892-2012(2022) Uranium metal, uranium dioxide powder and pellets, and uranyl nitrate solutions－Determination of fluorine content－Fluoride ion selective electrode method
KS M 1042-2009 Fluoride ion standard solution

ES-UNE

UNE-EN ISO 19448:2019 Dentistry - Analysis of Fluoride Concentration in Aqueous Solutions by use of Fluoride-Ion Selective Electrode (ISO 19448:2018)

German Institute for Standardization

DIN EN ISO 19448:2018-04 Dentistry - Analysis of Fluoride Concentration in Aqueous Solutions by use of Fluoride-Ion Selective Electrode (ISO 19448:2018); German version EN ISO 19448:2018
DIN EN ISO 19448:2018 Dentistry - Analysis of Fluoride Concentration in Aqueous Solutions by use of Fluoride-Ion Selective Electrode (ISO 19448:2018)

Universal Oil Products Company (UOP)

UOP 912-2006 Fluoride in Catalysts, Molecular Sieves, and Aqueous Solutions by Ion Selective Electrode

RU-GOST R

GOST 16287-1977 Glass industrial electrodes for determination hydrogan ion activition SSI. Specifications

AENOR

UNE-EN 16279:2012 Animal feeding stuffs - Determination of fluoride content after hydrochloric acid treatment by ion-sensitive electrode method (ISE)

Lithuanian Standards Office

LST EN 16279-2012 Animal feeding stuffs - Determination of fluoride content after hydrochloric acid treatment by ion-sensitive electrode method (ISE)

KR-KS

KS P ISO 19448-2021 Dentistry — Analysis of fluoride concentration in aqueous solutions by use of fluoride ion-selective electrode

HU-MSZT

MSZ 21862/9-1981 Testing of gaseous air pollutants in the workplace, determination of fluorine and hydrogen fluoride, ion selective electrodes

SE-SIS

SIS SS-ISO 9892:1992 Uranium metal, uranium dioxide powder and pellets, and uranyl nitrate solutions — Determination of fluorine content — Fluoride ion selective electrode method

Others: Chemical Analysis Method of Continuous Casting Mold Flux Determination of Fluorine Content by Ion Selective Electrode Method