GB/T 9737-2008Chemical reagent -- General rules for the determination of readily carbonizable substances (English PDF)

Foreword

This standard and ISO 6353-1. 1982 "Chemical analysis of reagent --- Part 1. General test method" non-equivalent.

This standard replaces GB/T 9737-1988 "Determination of chemical reagents easily carbonized material General", compared with the GB/T 9737-1988 Main Changes are as follows.

--- Increasing the cobalt chloride solution, a solution of copper sulfate, ferric chloride solution shelf (Excerpts 4.3,4.4,4.5);

--- Modify the mass fraction of cobalt chloride solution concentration calibration and calibration concentration copper sulfate solution of acetic acid solution (1988 Version of Appendix A; this edition of Appendix A);

--- Canceled Appendix B (1988 edition).

Appendix A of this standard is a normative appendix.

The standard proposed by China Petroleum and Chemical Industry Association.

This standard by the National Standardization Technical Committee Chemistry Chemicals Branch (SAC/TC63/SC3) centralized.

This standard was drafted. Sinopharm Chemical Reagent Co., Ltd.

1 Scope

This standard specifies 20 different shades of color standards, and be easy to use these standard colors carbonized substance determined General.

This standard applies to the determination of organic chemicals easily carbonized substances.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

Preparation of GB/T 601 chemical reagent standard titration solution GB/T 603 chemical reagent test method Preparations of articles (GB/T 603-2002, ISO 6353-1 with. 1982, NEQ) GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)

3 PRINCIPLE OF THE METHOD

Concentrated sulfuric acid composition of the water can be captured hydrogen and oxygen from some organic compounds, the carbonization of these organic compounds, so that the concentrated sulfuric acid or Mixture of concentrated sulfuric acid and the sample color rendering, can be used to visually easily carbonized material colorimetry.

4 Reagents and materials