GB/T 35924-2018Determination of moisture in solid chemical products－Thermogravimetry method (English PDF)
固体化工产品中水分含量的测定 热重法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
February 6, 2018
Implementation date
September 1, 2018
Scope
GB/T 35924-2018 is the English-translated version of 固体化工产品中水分含量的测定 热重法.
GB/T 35924-2018 specifies how to determine the moisture content of solid chemical products by thermogravimetric analysis. The sample is heated in a thermogravimetric analyser and the moisture content is read automatically from the thermogravimetric curve.
The method covers moisture contents from 0.050 % to 28.00 %, and it does not apply to products that weather, deliquesce or volatilize at room temperature, or to products that decompose below 105 °C. The analyser must conform to GB/T 27761 and have a built-in balance with a sensitivity of 0.001 mg, and the crucible is chosen so that it does not react with the sample.
The standard then sets the analytical procedure, how results are analysed and treated, and the precision of the method. It was issued on 6 February 2018 and has applied since 1 September 2018.
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Document preview — GB/T 35924-2018
National Standard of the People's Republic of China
- ICS
- 71.040.01
- Classification
- G 04
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword3
- 1 Scope4
- 2 Normative References4
- 3 Principle4
- 4 Apparatus and reagents4
- 5 Analytical Procedures5
- 6 Result Analysis and Treatment5
- 7 Precision6
1 Scope
This Standard specifies using the thermogravimetric analysis method to determine the moisture content in the solid chemical products.
This Standard is applicable to determine the moisture content in the solid chemical products with moisture content range from 0.050% to 28.00%.
This Standard is not applicable to the determination of chemical products that shall be weathered, deliquesced, volatized at the room temperature; or the determination of chemical products with decomposition temperature less than 105°C. For some samples, the moisture content may contain a quantity of volatiles at 105°C below.
2 Normative References
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.
GB/T 27761 Standard Test Method of Mass Loss and Residue Measurement Validation of Thermogravimetric Analyzers
3 Principle
The sample is heated in a thermogravimetric analyzer, and the moisture content in the sample is automatically determined based on the thermogravimetric curve.
4 Apparatus and reagents
4.1 Thermogravimetric analyzer, conforming to the thermal analyzer specified in GB/T 27761 with a built-in balance sensitivity of 0.001mg.
4.2 Crucible, select the crucible that does not react with the sample according to the […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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