GB/T 31531-2025Determination of quinoline and isoquinoline in dyestuffs and textile dyeing and finishing auxiliaries (English PDF)

Foreword

This document was drafted in accordance with the rules given in GB/T 1.1-2020 "Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents".

This document replaces GB/T 31531-2015 "Determination of quinoline in dyestuffs and textile dyeing and finishing auxiliaries". Compared to GB/T 31531-2015, in addition to structural adjustments and editorial changes, the main technical changes in this document are as follows.

a) Changed the scope of application of the standard (see Chapter 1 of this Edition; Chapter 1 of Edition 2015);

b) Added the method for determining the content of isoquinoline (see Chapter 4 of this Edition);

c) Changed the content of quinoline (see 4.3.1 of this Edition; 3.3.1 of Edition 2015);

d) Changed the packing material for capillary columns (see 4.4.2 of this Edition; 3.4.3 of Edition 2015);

e) Changed the gas chromatography operating conditions (see 4.5 of this Edition; 3.5 of Edition 2015);

f) Changed the calculation formula (see 4.9 of this Edition; 3.9 of Edition 2015);

g) Changed the recovery of quinoline (see 5.2 of this Edition; 4.2 of Edition 2015);

h) Changed the precision of quinoline (see 5.3 of this Edition; 4.3 of Edition 2015);

i) Added the recovery of isoquinoline, precision (see Chapter 5 of this Edition).

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing authority shall not be held responsible for identifying any or all such patent rights.

This document was proposed by China Petroleum and Chemical Industry Federation.

This document shall be under the jurisdiction of National Technical Committee on Dyestuffs of Standardization Administration of China (SAC/TC 134).

The drafting organizations of this document. Zhejiang Boao New Materials Co., Ltd., Shaoxing Demei New Materials Co., Ltd., Shenyang Shenyang Institute of Chemical Technology Testing Technology Co., Ltd., Shenyang Research Institute of Chemical Industry Co., Ltd., Shenyang Shenyang Institute of Chemical Technology Testing Determination of quinoline and isoquinoline in dyestuffs and textile dyeing and finishing auxiliaries WARNING -- Personnel using this document shall have practical experience in formal laboratory work. This document does not address all possible safety issues.

Users are responsible for taking appropriate safety and health measures and ensuring compliance with relevant national regulations.

1 Scope

This document describes the method for the determination of free quinoline and isoquinoline content in dyestuffs and textile dyeing and finishing auxiliaries.

This document is applicable to the determination of free quinoline and isoquinoline content in various dosage forms of dyes, dye products, and textile dyeing and finishing auxiliaries. Molecular formula. C9H7N Structural formula.

Relative molecular mass. 129.16 (according to the 2022 international relative atomic mass)

2 Normative references

GB/T 6682-2008

GB/T 8170-2008

GB/T 9722-2023

3 Terms and definitions

There are no terms or definitions that require definition in this document.

4 Test methods