Chemical reagent - General rules for the determination of readily carbonizable substances
1 Scope
This standard specifies 20 standard colors of different hues and the general rules for the determination of readily carbonizable substances using these standard colors.
This standard is applicable to the determination of readily carbonizable substances in organic chemical reagents.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document applies.
GB/T 601 Chemical reagent - Preparations of standard volumetric solutions
GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test methods (GB/T 603-2002, ISO 6353-1:1982, NEQ)
GB/T 6682 Water for analytical laboratory use - Specification and test methods (GB/T 6682-2008, ISO 3696:1987, MOD)
3 Method principle
Concentrated sulfuric acid can abstract hydrogen and oxygen from certain organic compounds in the proportions forming water, thereby carbonizing these organic compounds, which causes the concentrated sulfuric acid or the mixture of concentrated sulfuric acid and the sample to develop a color. This may be used for the visual colorimetric determination of readily carbonizable substances.
Foreword i
1 Scope
2 Normative references
3 Method principle
4 Reagents and materials
5 Determination
Annex A (Normative) Calibration of the mass concentration of cobalt chloride solution, copper sulfate solution and ferric chloride solution
Chemical reagent - General rules for the determination of readily carbonizable substances
1 Scope
This standard specifies 20 standard colors of different hues and the general rules for the determination of readily carbonizable substances using these standard colors.
This standard is applicable to the determination of readily carbonizable substances in organic chemical reagents.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document applies.
GB/T 601 Chemical reagent - Preparations of standard volumetric solutions
GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test methods (GB/T 603-2002, ISO 6353-1:1982, NEQ)
GB/T 6682 Water for analytical laboratory use - Specification and test methods (GB/T 6682-2008, ISO 3696:1987, MOD)
3 Method principle
Concentrated sulfuric acid can abstract hydrogen and oxygen from certain organic compounds in the proportions forming water, thereby carbonizing these organic compounds, which causes the concentrated sulfuric acid or the mixture of concentrated sulfuric acid and the sample to develop a color. This may be used for the visual colorimetric determination of readily carbonizable substances.
Contents of GB/T 9737-2008
Foreword i
1 Scope
2 Normative references
3 Method principle
4 Reagents and materials
5 Determination
Annex A (Normative) Calibration of the mass concentration of cobalt chloride solution, copper sulfate solution and ferric chloride solution
