GB/T 210-2022Sodium carbonate for industrial use (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" drafted.

This document replaces GB/T 210.1-2004 "Industrial sodium carbonate and its test methods - Part 1: Industrial sodium carbonate" and GB/T 210.2- 2004 "Industrial sodium carbonate and its test methods - Part 2: Industrial sodium carbonate test method", and GB/T 210.1-2004 and Compared with GB/T 210.2-2004, in addition to structural adjustment and editorial changes, the main technical changes are as follows.

a) Changed the requirements for the iron content index of Class I, Class II first-class products and qualified products (see 6.2, 4.2 of GB/T 210.1-2004 edition);

b) Deleted the requirement for sulfate index of Class II superior products (4.2 of GB/T 210.1-2004 edition);

c) An automatic potentiometric titrator is added to the chloride content determination method (see 7.4.1.3);

d) Inductively coupled plasma emission spectrometry has been added to the iron content determination method (see 7.5.2);

e) In the determination method of water-insoluble matter, the microporous filtration membrane method was added, and the test paper method was deleted (see 7.7.2, GB/T 210.2-2004 edition). 3.7.4.2).

1 Scope

This document specifies the classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of industrial sodium carbonate.

This document is applicable to industrial sodium carbonate prepared by ammonia-alkali method, combined alkali method or other methods using industrial salt or trona as raw material.

Note: This product is mainly used in chemical, glass, metallurgy, papermaking, printing and dyeing, synthetic detergent, petrochemical and other industries.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 191-2008 Graphical signs of packaging, storage and transportation

GB/T 3049-2006 General method for the determination of iron content in industrial chemical products 1,10-phenanthroline spectrophotometric method

GB/T 3050-2000 General method for determination of chloride content in inorganic chemical products Potentiometric titration method

GB/T 3051-2000 General method for the determination of chloride content in inorganic chemical products Mercury measurement method

GB/T 6003.1-2012 Technical requirements and inspection of test sieves - Part 1: Test sieves for wire woven mesh

GB/T 6678 General Rules for Sampling of Chemical Products

GB/T 6682-2008 Specifications and test methods for water used in analytical laboratories

GB/T 8170 Numerical Rounding Rules and Representation and Judgment of Limit Values

HG/T 3696.1 Preparation of standard solutions, preparations and products for chemical analysis of inorganic chemical products - Part 1: Standard titration solution liquid preparation

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

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

3 Terms and Definitions

There are no terms and definitions that need to be defined in this document.

4 Molecular formula and relative molecular mass

Molecular formula. Na2CO3.

Relative molecular mass. 105.99 (according to the.2018 international relative atomic mass).

5 Categories

Industrial sodium carbonate is divided into two categories according to its use.