GB/T 31531-2015 in English

《GB/T 31531-2015染料及纺织染整助剂产品中喹啉的测定》由TC134（全国染料标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
本标准规定了染料、纺织染整助剂产品中游离喹啉含量的测定方法。
本标准适用于各类剂型的染料、染料制品、纺织染整助剂。

1 Scope

This standard specifies the determination method of free quinoline content in dyestuffs and textile dyeing and finishing auxiliaries.

This standard is applicable to each dosage forms of dyestuffs, dye products and textile dyeing and finishing auxiliaries.

Structural formula:
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Molecular formula: C9H7N

Relative molecular mass: 129.16 (according to international relative atomic mass in 2009)

CAS RN: 91-22-5

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 9722-2006 Chemical reagent - General rules for the gas chromatography

3 Determination methods

3.1 General requirements

Foreword i
1 Scope
2 Normative references
3 Determination methods
4 Minimum quantitation limit, recovery rate and precision
5 Test report