Analysis method of industrial sodium sulfate

Analysis method of industrial sodium sulfate, Total:202 items.

The international standard classification for "Analysis method of industrial sodium sulfate" includes: Inorganic chemicals in general , Salts , Bases , Surface active agents , Nickel, chromium and their alloys , Production in the chemical industry , Ferrous metals , Other non-ferrous metals and their alloys , Chemical analysis of metals , Metallic coatings .

The Chinese standard classification for "Analysis method of industrial sodium sulfate" includes: Inorganic chemicals in general , Inorganic salt , Inorganic acid and alkali , Light metals and their alloys analysis method , Basic standards and general methods for surface active agent , Steel and iron alloy analysis method , Rare metals and their alloys analysis method , Heavy metals and their alloys analysis method , Semimetal and semiconductor material analysis method , Metal and alloy powder , Technical Management .

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

GB/T 38731-2020 Surface active agents—Test methods of technical sodium secondary alkylsulphates
GB/T 23852-2009 Analytical method of thiocyanate for industrial use
GB/T 8158.5-1987 Methods for chemical analysis of sodium fluoride--The turbidimetric method for the determination of soluble sulphates content
GB/T 210.1-2004 Specification and determination methods of sodium carbonate for industrial use--Part 1:sodium carbonate for industrial use
GB/T 6009-2014 Anhydrous sodium sulfate for industrial use
GB/T 6009-2003 Anhydrous sodium sulfate for industrial use
GB/T 8156.8-1987 Methods for chemical analysis of aluminium fluoride for industrial use--The barium sulphate gravimetric method for the determination of sulphate content
GB/T 8638.9-1988 Nickel base alloy powder; Determination of copper content; Thiosulfate-iodimetric method
GB/T 26519.1-2021 Persulfate for industrial use—Part 1:Sodium persulfate for industrial use
GB/T 26519.1-2011 Persulfate for industrial use—Part 1:Sodium persulfate for industrial use
GB/T 23940-2009 Analytical methods of persulfate products for industrial use
GB 210.1-2004 Specification and determination methods of sodium carbonate for industrial use - Part 1:Sodium carbonate for industrial use
GB 9005-1988 Anhydrous sodium sulphite for industrial use
GB/T 23940-2021 Analytical methods of persulfate products for industrial use
GB/T 38685-2020 Determination of sulphuric acid mist in tail gas for sulphuric acid industry
GB/T 210.2-2004 Specification and determination methods of sodium carbonate for industrial use - Part 2:Specification and determintion methods
GB/T 223.18-1994 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium Thiosulfate Separation Iodimetric Method for the Determination of Copper Content
GB 223.18-1982 Chemical analysis of iron, steel and alloy--The determination of copper by thiosulfate-iodide method
GB/T 38729-2020 Surface active agents—Test methods of technical sodium primary alkylsulphates

Professional Standard - Chemical Industry

HG/T 4516-2022 Sodium bisulfate for industrial use
HG/T 2967-2010 Anhydrous sodium sulphite for industrial use
HG/T 3812-2006 Sodium thiocyanate for industrial use
HG/T 2967-1997 Industrial Anhydrous Sodium Sulfite
HG/T 2826-2008 Sodium metabisulphite for industrial use
HG/T 2967-2000 Anhydrous sodium sulphite for industrial use
HG/T 2826-1997 Sodium metbisulphite for industrial use
HG/T 4516-2013 Sodium Bisulfate for Industrial Use
HG/T 3814-2006 Sodium bisulfite for industrial use
HG/T 2328-1992 Industrial sodium thiosulfate
HG/T 2328-2006 Sodium hyposulfite for industry use

Taiwan Provincial Standard of the People's Republic of China

CNS 1424-1963 Method of Test for Anhydrous Sodium Sulfite of Industrial Grade
CNS 1343-1992 Method of Test for Sodium Dithionite for Industrial Use
CNS 6197-1980 Determination of Moisture Content of Sodium Chlorate for Industrial Use(Gravimetric Method)
CNS 1004-1974 Methods of Test for Sodium Sulfate, Technical Grade
CNS 1421-1962 Sodium Thiosulfate (Industrial Grade)
CNS 2678-1966 Sodium Formaldehyde Sulfoxylate for Industrial Use
CNS 435-1981 Sodium Sulfate, for Industrial Use
CNS 1342-1992 Sodium Dithionite for Industrial Use
CNS 1422-1962 Method of Test for Sodium Thiosulfate of Industrial Grade
CNS 1423-1962 Sodium Sulfite, Anhydrous (Industrial Grade)

Group Standards of the People's Republic of China

T/CIEP 0035-2023 Sodium sulfate decahydrate for industrial use
T/CCT 001-2019 Coal chemical industry by-product industrial sodium sulfate
T/ZZB Q056-2022 By-product industrial salt (sodium chloride, sodium sulfate)
T/ZAQ 10106-2022 By-product industrial salt (sodium chloride, sodium sulfate)
T/CSTM 00780.1-2023 Methods for chemical analysis of sodium vanadate—Part 1: Determination of vanadium content —Ammonium ferrous sulfate titrimetric method
T/ZGZS 0303-2023 Reclaimed industrial salt—Sodium sulfate

Professional Standard - Non-ferrous Metal

YS/T 252.4-2007 Methods for chemical analysis of nickel matte-Determination of cobalt content-Sodium thiosulphate titrimetric method
YS/T 535.5-2006 Method for chemical analysis of sodium fluoride - Determination of soluble sulfate content by nephelometric method
YS/T 716.1-2009 Methods for chemical analysis of low grade blister—Part 1:The determination of copper content—Sodium hyposulfite titration
YS/T 226.12-2009 Methods for chemical analysis of selenium - Part 12: Determination of selenium content - Sodium thiosulphate titrimetric method
YS/T 539.9-2006 Nickel base alloy powder -- Determination of copper content -- Thiosulfate-iodimetric method
YS/T 539.9-2009 Methods for chemical analysis of nickel base alloy powder—Part 9:Determination of copper content—Thiosulfate iodimetry
YS/T 475.4-2005 Methods for chemical analysis of cast bearing metals -- Determination of copper content -- Hyposulphite titrimetric method

Qinghai Provincial Standard of the People's Republic of China

DB63/T 1296-2014 Determination of sodium chloride and sulfate content in industrial sodium carbonate by ion chromatography

Professional Standard - Aviation

HB/Z 5088.2-1999 Analysis Method for Nickel Plating Solution Determination of Sodium Sulfate Content Through Precipitation Titration
HB/Z 5109.7-2001 Analysis method for passivation solution Determination of sodium sulfate in zinc plating, cadmium plating nitric acid passivation solution

Professional Standard - Electron

SJ/T 10087.8-1991 Methods for chemical analysis for glass raw materials for colour picture tubes - Methods for chemical analysis of sodium pyroautimonate
SJ/T 10087.7-1991 Methods of chemical analysis for glass raw materials for colour picture tubes - Methods for chemical analysis of Sodium fluorosilicate

Korean Agency for Technology and Standards (KATS)

KS M ISO 894-2007(2018) Surface active agents－Technical sodium primary alkylsulphates－Methods of analysis
KS M ISO 894-2023 Surface active agents－Technical sodium primary alkylsulphates－Methods of analysis
KS M ISO 895-2023 Surface active agents－Technical sodium secondary alkylsulphates－Methods of analysis
KS M ISO 895-2007(2018) Surface active agents－Technical sodium secondary alkylsulphates－Methods of analysis
KS M ISO 895-2007(2023) Surface active agents－Technical sodium secondary alkylsulphates－Methods of analysis
KS M ISO 894-2007(2023) Surface active agents－Technical sodium primary alkylsulphates－Methods of analysis
KS M ISO 895:2007 Surface N agents-Technical sodium secondary alkylsulphates-Methods of analysis
KS M ISO 894:2007 Surface N agents-Technical sodium primary alkylsulphates-Methods of analysis
KS M ISO 2480:2017 Sodium chloride for industrial use — Determination of sulphate content — Barium sulphate gravimetric method
KS M ISO 2480-2017 Sodium chloride for industrial use — Determination of sulphate content — Barium sulphate gravimetric method
KS M ISO 2480-2022 Sodium chloride for industrial use — Determination of sulphate content — Barium sulphate gravimetric method
KS M ISO 2480-2017(2022) Sodium chloride for industrial use — Determination of sulphate content — Barium sulphate gravimetric method
KS M ISO 2480:2012 Sodium chloride for industrial use-Determination of sulphate content-Barium sulphate gravimetric method
KS M ISO 893:2007 Surface active agents－Technical alkane sulfonates－Methods of analysis

National Standardisation Body (ASRO)

STAS 1817/3-1974 SODIUM THIOSULFATE Methods of analysis
STAS 9482-1974 SULPHURIC ACID AND OLEUM FOR INDUSTRIAL USE Methods of analysis
STAS 6413-1986 TECHN1CAL SODICM F'ORMAL- DEHYDE SULPHOXYLATE
STAS SR ISO 2480:1995 Sodium chloride for industrial use. Determination of sulphate content. Barium sulphate gravimetric method
STAS 2221/3-1981 ANHYDROUS SODIUM SULFITE Checking methods

GCC Standardization Organization

BH GSO ISO 2480:2024 Sodium chloride for industrial use - Determination of sulphate content - Barium sulphate gravimetric method
GSO ISO 2480:2008 Sodium chloride for industrial use - Determination of sulphate content - Barium sulphate gravimetric method

The Directorate General of Specifications and Metrology (DGSM)

OS GSO ISO 894:2015 Surface active agents -- Technical sodium primary alkylsulphates -- Methods of analysis
OS GSO ISO 895:2015 Surface active agents -- Technical sodium secondary alkylsulphates -- Methods of analysis
OS GSO ISO 2480:2008 Sodium chloride for industrial use - Determination of sulphate content - Barium sulphate gravimetric method

British Standards Institution (BSI)

BS 7319-4:1990 Analysis of sodium chloride for industrial use. Method for determination of sulphate content
BS 5705-7:1981 Methods of test for sodium hexafluorosilicate for industrial use-Determination of sulphate content
BS 6070-5:1981 Methods of sampling and test for sodium carbonate for industrial use. Determination of sulphate content
BS EN 14670:2005 Surface active agents - Sodium dodecyl sulfate - Analytical method
BS 6092-12:1981(2011) Methods of Sampling and test for sodium and potassium silicates for industrial use — Part 12 : Limit test for sulphate content of sodium metasilicate
BS 6092-12:1981 Methods of sampling and test for sodium and potassium silicates for industrial use - Limit test for sulphate content of sodium metasilicate
BS 4427-12:1979 Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use - Condensed phosphates for industrial use (including foodstuffs) - Determination of arsenic content - Silver die
BS 6092-8:1981 Methods of sampling and test for sodium and potassium silicates for industrial use - Determination of sulphate content
BS 7319-1:1990 Analysis of sodium chloride for industrial use. Method for determination of sodium chloride content
BS 5072-7:1980 Methods of test for Sodium fluoride for industrial use - Part 7: Determination of soluble sulphates content
BS 6075-8:1981 Methods of sampling and test for sodium hydroxide for industrial use. Determination of sulphate content

International Organization for Standardization (ISO)

ISO 894:1977 Surface active agents; Technical sodium primary alkylsulphates; Methods of analysis
ISO 895:1977 Surface active agents; Technical sodium secondary alkylsulphates; Methods of analysis
ISO 5142:1977 Sodium sulphate for industrial use; Determination of sodium sulphate content; Gravimetric method
ISO 3237:1975 Sodium sulphate for industrial use; Determination of sulphates content; Calculation method and barium sulphate gravimetric method
ISO 743:1976 Sodium carbonate for industrial use; Determination of sulphate content; Barium sulphate gravimetric method
ISO 893:1978 Surface active agents — Technical sodium alkane sulphonates — Methods of analysis
ISO 2480:1972 Sodium chloride for industrial use; Determination of sulphate content; Barium sulphate gravimetric method
ISO 982:1976 Sodium hydroxide for industrial use — Determination of sulphate content — Barium sulphate gravimetric method
ISO 3200:1975 Sodium and potassium silicates for industrial use; Determination of sulphates content; Barium sulphate gravimetric method
ISO 3235:1975 Sodium sulphate for industrial use; Determination of acid-insoluble matter
ISO 3240:1975 Sodium sulphate for industrial use; Determination of acidity or alkalinity
ISO 3236:1975 Sodium sulphate for industrial use — Determination of chlorides content — Mercurimetric method
ISO 3241:1975 Sodium sulphate for industrial use; Measurement of pH; Potentiometric method
ISO 1918:1972 Boric acid, boric oxide, disodium tetraborates and crude sodium borates for industrial use; Determination of sulphur compounds; Volumetric method
ISO 2486:1973 Potassium sulphate for industrial use — Determination of potassium content — Sodium tetraphenylborate volumetric method

Association Francaise de Normalisation

NF T73-232:1978 Surface active agents. Technical sodium secondary alkylsulphates. Methods of analysis.
NF T73-231:1978 Surface active agents. Technical sodium primary alkylsulphates. Methods of analysis.
NF T20-459:1980 Sodium sulphate for industrial use. Determination of sodium sulphate content. Gravimetric method.
NF T20-454:1976 Sodium sulphate for industrial use. Determination of sulphate content. Calculation method and barium sulphate gravimetric method.
NF T20-364:1978 Potassium sulphate for industrial use. Determination of sulphate content.baryum sulphate gravimetric method.
NF T20-417:1975 Sodium carbonate for industrial use. Determination of sulphate content. Barium sulphate gravimetric method.
NF T20-405:1982 Sodium chloride for industrial use. Determination of sulphate content. Barium sulphate gravimetric method.
NF T73-292*NF EN 14670:2005 Surface active agents - Sodium dodecyl sulfate - Analysis method.
NF T73-233*NF ISO 893:1990 Surface active agents. Technical alkane sulfonates. Methods of analysis.
NF EN 14670:2005 Surfactants - Sodium dodecyl sulfate - Method of analysis
NF T20-527:1980 Sodium and potassium silicates for industrial use. Determination of sulphates content. Barium sulphate gravimetric method.
NF T20-429:1976 Sodium hydroxyde for industrial use. Determination of sulphate content. Barium sulphate gravimetric method.
NF T20-457:1976 Sodium sulphate for industrial use. Determination of acidity or alkalinity.
NF T20-458:1976 Sodium sulphate for industrial use. Measurement of ph. Potentiometric method.
NF T20-485:1973 Sodium tripolyphosphate and pyrophosphate for industrial use. Granulometric analysis by mechanical sieving.
NF T20-452:1976 Sodium sulphate for industrial use. Determination of acid-insoluble matter.

Türk Standardları Enstitüsü

TS 757-1969 SODIUM CARBONATE FOR INDUSTRIAL USE DETERMINATION OF SULPHATE CONTENT BARIUM SULPHATE GRAVIMERTIC METHOD
TS 993-1971 SODIUM HYDROXIDE AND POTASSIUM HYDROXIDE FOR INDUSTRIAL USE DETERMINATION OF SULPHATE CONTENT (BARIUM SULPHATE GRAVIMETRIC METHOD
TS 2226-1976 SODIUM AND POTASSIUM SILICATES FOR INDUSTRIAL USE DETERMINATION OF SULPHATES CONTENT BARIUM SULPHATE GRAVIMETRIC METHOD
TS 1809-1975 BORIC ACID, BORIC OXIDE, DISODIUM TETRABORATES AND CRUDE SODIUM BORATES FOR INDUSTRIAL USE — DETERMINATION OF SULPHUR COMPOUNDS — VOLUMETRIC METHOD

Gosstandart of Russia

GOST R 50001-1992 Surface active agents. Technical sodium secondary alkylsulphates. Methods of analysis
GOST R 50002-1992 Surface active agents. Primary technical sodium alkylsulphates. Methods of analysis
GOST 6318-1977 Sodium sulphate technical. Specifications
GOST 31803-2012 Sulfuric acid. Methods for analysis
GOST 11683-1976 Technical sodium pyrosulfite. Specifications
GOST 902-1976 Sodium bisulphite technical (aqueous solution). Specifications

Belgian Standards Institute

NBN T 63-111-1980 Surface active agents - Technical sodium primary alkylsulphates -Methods of analysis
NBN T 63-112-1980 Surface active agents - Technical sodium secondary alkylsulphates -Methods of analysis
NBN T 03-179-1980 Sodium sulphate for industrial use - Determination of sodium sulphate content - Gravimetrie method
NBN T 03-174-1980 Sodium sulphate for industrial use - Determination of sulphates content - Calculation method and barium sulphate gravimetric method
NBN T 03-241-1980 Sodium and potassium silicates for industrial use - Determination of sulphates content - Barium sulphate gravimetrie method
NBN T 03-162-1980 Sodium chloride for industrial use - Determination of sulphate content - Barium sulphate gravimetrie method
NBN T 03-173-1980 Sodium sulphate for industrial use - Determination of ohlorides content -Mercurimetric method
NBN T 03-110-1979 Sodium carbonate for industrial use - Determination of sulphate content - Barium sulphate gravimetrie method
NBN T 03-124-1980 Sodium hydroxide for industrial use - Determination of sulphate content - Barium sulphate gravimetrie method
NBN T 03-178-1980 Sodium sulphate for industrial use - Measurement of pH - Potentiometric method
NBN T 03-175-1980 Sodium sulphate for industrial use - Determination of calcium content -EDTA complexometric method
NBN T 03-177-1980 Sodium sulphate for industrial use - Determination of acidity of alkalinity
NBN T 03-024-1979 Sulphuric acid and oleum for industrial use - Determination of ammoniacal nitrogen content - Spectrophotometric method

Magyar Szabványügyi Testület

MSZ 6067-1966 Sodium bisulfite, industrial sodium bisulfite
MNOSZ 9791-1953 Industrial sodium sulfate
MSZ 24215-1964 Sodium Thiosulfate Analysis
MSZ 9277-1957 Sodium sulfate for analysis
MNOSZ 925-1950 Anhydrous sodium sulfate, industrial
MSZ 9276-1966 Anhydrous sodium sulfate for analysis
MNOSZ 1015-1951 Sodium sulfite, anhydrous and industrial
MSZ 9275-1982 Crystalline sodium sulfate for analysis
MSZ 7358-1959 Sodium sulfate for analytical purposes
MSZ 7357-1959 Sodium sulfite for analytical purposes
MNOSZ 926-1950 Sodium sulfate (glauber's salt), crystallized, industrial use

Spanish Association for Standardization (UNE)

UNE 55504-3:1981 SURFACE ACTIVE AGENTS. ANALYSIS OF TECHNICAL SODIUM SEC-ALKYLSULPHATES. DETERMINATION OF THE SODIUM SEC-ALKYLSULPHATES CONTENT
AENOR UNE 55512-8:1970 SURFACE AGENTS. ANALYSIS OF TECHNICAL SODIUM ALKYLARYL-SULPHONATES. DETERMINATION OF SODIUM SULFITE CONTENT.
UNE 55511-1:1981 SURFACE ACTIVE AGENTS. ANALYSIS OF TECHNICAL SODIUM PRIM-ALKYLSULFATES. SCOPE
UNE 55504-1:1981 SURFACE ACTIVE AGENTS. ANALYSIS OF TECHNICAL SODIUM SEC-ALKYSULPHATES. SCOPE
UNE 30189:1963 ANALYSIS REAGENTS. SODIUM THIOSULPHATE.
UNE 30210:1968 CHEMICAL ANALYSIS OF TECHNICAL SODIUM CARBONATE.
UNE 55511-4:1981 SURFACE ACTIVE AGENTS. ANALYSIS OF TECHNICAL SODIUM PRIM-ALKYLSULFATES. DETERMINATION OF THE CONTENT OF SODIUM CHLORIDE
AENOR UNE 55660:1982 Surface agents. Sodium sulfate used as raw material for detergent formulations. Determination of sodium sulfate content. Gravimetric method.
UNE 55-510-1991 Surface active agents. Technical alkane sulfonates. Methods of analysis
UNE-EN 14670:2005 Surface active agents - Sodium dodecyl sulfate - Analytical method
UNE 30175:1962 ANALYSIS REAGENTS. ACID SULPHATE OF MELTED SODIUM.
UNE 30187:1962 ANALYSIS REAGENTS. ANHYDROUS SODIUM SULPHATE.
AENOR UNE 55512-7:1970 SURFACE AGENTS. ANALYSIS OF TECHNICAL SODIUM ALKYLARYL-SULPHONATES. RAPID METHOD FOR DETERMINATION OF THE CONTENT OF SODIUM ALKYL-ARYL SULFONATES.
AENOR UNE 55512-9:1970 SURFACE AGENTS. ANALYSIS OF TECHNICAL SODIUM ALKYLARYL-SULPHONATES. DETERMINATION OF THE ORGANIC SULFUR CONTENT FROM THE SULPHONATE GROUP. WURZSCHMITT METHOD.
AENOR UNE 55512-11:1970 Surface agents. Analysis of technical sodium alkyl-aryl sulfonates. Determination of sodium sulfonate content.
AENOR UNE 55512-10:1970 Surface agents. Analysis of technical sodium alkyl-aryl sulfonates. Determination of the organic sulfur content from the sulfonate group. Grote-Krekeler method.
UNE 30 187 Analytical reagents. Anhydrous sodium sulfate S04Na2M 142,06

Bureau of Indian Standards

IS 248-2023 Sodium Bisulphite, Technical (Sodium Metabisulphite)- Specification
IS 255-1982 Specification for Anhydrous Sodium Sulfate (Industrial Grade)

Yugoslav Association for Standardization

JUS H.B8.320-1977 Sodium and potassium silicates for industrial use. Determination of sulphates content. Bariton sulphate gravimetric method

Czech Standards Institute (UNMZ)

CSN 65 3120-1986 Sodium thiosulphate crystalline for industrial use
CSN 65 2085-1984 Sodium carbonate technical Gravimetric method of sulphate content determination

German Institute for Standardization

DIN EN 14670:2005 Surface active agents - Sodium dodecyl sulfate - Analytical method; German version EN 14670:2005
DIN EN 14670:2005-09 Surface active agents - Sodium dodecyl sulfate - Analytical method; German version EN 14670:2005

Portuguese Institute of Quality

NP 1246-1976 Sodium sulfate used in industry. Measurement of sulfuric acid composition by hydrometry
NP 1184-1976 Sodium carbonate used in industry. Measurement of sulfate content

Defense Logistics Agency

DLA A-A-59160 VALID NOTICE 1-2004 SODIUM SULFITE, ANHYDROUS, TECHNICAL
DLA A-A-59160-1998 SODIUM SULFITE, ANHYDROUS, TECHNICAL
DLA A-A-59160 A-2009 SODIUM SULFITE, ANHYDROUS, TECHNICAL

European Committee for Standardization (CEN)

EN 14670:2005 Surface active agents - Sodium dodecyl sulfate - Analytical method

Ente Nazionale Italiano di Unificazione

UNI EN 14670:2005 Surface active agents - Sodium dodecyl sulfate - Analytical method
UNI 6022-1967 Sodium carbonate for industrial use. Sulfate determination. volumetric method
UNI 6022:1967 Sodium carbonate for industrial use. Determination of solphate content. Gravimetric method.

Danish Standards Foundation

DANSK DS/EN 14670:2005 Surface active agents - Sodium dodecyl sulfate - Analytical method
DS/EN 14670:2005 Surface active agents - Sodium dodecyl sulfate - Analytical method

Standards Norway

NS 9045:1981 Sodium hydroxide for industrial use — Determinatio of sulphate content — Barium sulphate gravimetric method
NS-EN 14670:2005 Surface active agents — Sodium dodecyl sulfate — Analytical method

Lithuanian Standards Office

LST EN 14670-2005 Surface active agents - Sodium dodecyl sulfate - Analytical method
LST ISO 2480:2003 Sodium chloride for industrial use. Determination of sulphate content. Barium sulphate gravimetric method (idt ISO 2480:1972)

Thai Industrial Standards Institute (TISI)

TIS 1142-1993 Sodium hydrosulphite for industrial use
TIS 723-1987 Standard for anhydrous sodium sulphate for industrial use

Japanese Industrial Standards Committee (JISC)

JIS K 1200-4:2000 Sodium hydroxide for industrial use -- Part 4: Determination of sodium sulfate content

Indonesia Standards

SNI 06-4987-1999 Method for production of standard sodium thiosulphate 0.1 N solutions and method for standardization

CL-INN

INDITECNOR 6I-9ch-1958 Aluminum Sulfate: Analytical Methods

Others: Analysis method of industrial thiocyanate,Analysis method of industrial sodium sulfate,Industrial Sodium Sulfate Analysis Method,Analysis method of sodium sulfate,Analytical method of sodium sulfate content,Analysis method of sodium thiosulfate,Industrial Analysis Methods of Coal