GB/T 23844-2019General method for the determination of sulphate in inorganic chemicals products (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 23844-2009 "General method for the determination of sulfate in inorganic chemical products, visual turbidimetry".

Compared with GB/T 23844-2009, the main technical changes except editorial changes are as follows:

--- Revised the standard name, modified from "visual turbidimetric method for the determination of sulfate in inorganic chemical products" to "inorganic chemical production General method for determination of sulfate in products" (see standard name, standard name for 2009 edition);

--- Added "Spectrophotometry" and "Inductively Coupled Plasma Atomic Emission Spectrometry" (see Chapters 5 through 6);

--- Increased test conditions for inductively coupled plasma atomic emission spectrometry (see Appendix A).

1 Scope

This standard specifies the principles, reagents or materials, equipment, test procedures and tests for the general method for the determination of sulfate in inorganic chemical products. Data processing.

This standard applies to the determination of sulfate in inorganic chemical products.

Note: The range of visual turbidimetry is 0.4µg/mL~4.0µg/mL, and the spectrophotometric range is 1.0µg/mL~10.0µg/mL. Inductively coupled plasma The range of the measurement by bulk emission spectroscopy was not less than 0.25 µg/mL.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 6682-2008 Analytical laboratory water specifications and test methods

HG/T 3696.2 Preparation of standard solutions, preparations and products for chemical analysis of chemical products - Part 2: Liquid preparation

HG/T 3696.3 Preparation of standard solutions, preparations and products for chemical analysis - Part 3: Preparations and preparations Preparation

3 General regulations

The reagents and water used in this standard, unless otherwise specified, should be analytically pure or analytically pure and in accordance with the provisions of the third-grade water in GB/T 6682-2008. Standard solutions, preparations and products for the determination of impurities required in the test, when no other requirements are specified, Prepared by HG/T 3696.2 and HG/T 3696.3.

4 Visual turbidimetry