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GB/T 27594-2025: Disperse dyestuffs - Determination of relative strength - Spectrophotometer method
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 27594-2025	English	209	Add to Cart	3 days [Need to translate]	Disperse dyestuffs - Determination of relative strength - Spectrophotometer method
GB/T 27594-2011	English	139	Add to Cart	3 days [Need to translate]	Disperse dyestuffs -- Determination of relative strength of press cakes -- Spectrophotometer method

GB/T 27594-2025: Disperse dyestuffs - Determination of relative strength - Spectrophotometer method

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ICS 71.100.01;87.060.10 CCSG55 National Standards of the People's Republic of China Replaces GB/T 27594-2011 Spectrophotometric method for determining the relative intensity of disperse dyes Published on 2025-10-05 Implemented on May 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document supersedes GB/T 27594-2011 "Determination of Relative Intensity of Disperse Dyes - Spectrophotometric Method", and is consistent with GB/T 27594- Compared to.2011, aside from structural adjustments and editorial changes, the main technical changes are as follows. a) The scope of application of the standard has been changed (see Chapter 1, Chapter 1 of the.2011 edition); b) Added terms and definitions (see Chapter 3); c) Reagents and materials have been changed (see Chapter 6, Chapter 5 in the.2011 edition); d) Added solvent selection (see 7.1); e) The requirements for solids content calculation results have been changed (see 7.2.1.2, 6.1.2 of the.2011 version); f) Added dye standards (see 7.2.2.1); g) The preparation method of the original dye sample solution has been modified (see 7.2.2.3, 6.2.2 in the.2011 version); h) The requirements for calculating the relative strength of the original dry dye have been changed (see 7.2.4.1,.2011 version 6.4.1); i) The formula for calculating the relative strength of trendy items has been changed (see 7.2.4.2, 6.4.2 in the.2011 version); j) The determination of the relative intensity of commercial dyes has been added (see 7.3); k) The content of the test report has been changed (see Chapter 8, Chapter 7 of the.2011 edition). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Petroleum and Chemical Industry Federation. This document is under the jurisdiction of the National Technical Committee on Standardization of Dyes (SAC/TC134). This document was drafted by. Zhejiang Longsheng Group Co., Ltd., Zhejiang Yunzhongma Co., Ltd., and Shenyang Shenhua Research Institute Testing Technology Co., Ltd. Limited Company, Shenyang Chemical Research Institute Co., Ltd., Shenhua Testing Technology (Nantong) Co., Ltd., Modern Textile Technology Innovation Center (Jianhu Laboratory) room). The main drafters of this document are. Gao Huaiqing, Ye Fuzhong, Dong Zhongsheng, Cui Zhihua, Shen Jianliang, Ye Chengjie, Yang Zhenmei, Zhu Peiming, and Qi Dongming. This document was first published in.2011, and this is its first revision. Spectrophotometric method for determining the relative intensity of disperse dyes Warning. This document should be used by personnel with practical experience in formal laboratory work. This document does not address all potential safety issues. Users are responsible for taking appropriate safety and health measures and complying with the conditions stipulated by relevant national regulations.

1 Scope

This document describes a spectrophotometric method for determining the relative intensity of disperse dyes. This document applies to the determination of the relative intensity of disperse dyes that conform to the Lambert-Beer law.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 2374-2017 General conditions for dyeing determination GB/T 6687 Dye Terminology GB/T 8170-2008 Rules for rounding off numerical values and the representation and determination of limiting values

3 Terms and Definitions

The terms and definitions defined in GB/T 6687 apply to this document. 4.Principles After dissolving the disperse dye sample and standard in a solvent, the absorbance at the maximum absorption wavelength was measured using a spectrophotometer. The relative intensity of the disperse dye sample was calculated using Lambert-Beer's law. 5.Instruments and Equipment The instruments and equipment used should meet the following requirements. a) Spectrophotometer. Operating wavelengths range from 380nm to 700nm; Cuvette optical path is 10mm. b) Electric drying oven. controllable temperature ±2℃; c) Analytical balance. minimum scale division not greater than 0.0001g; d) Volumetric flasks. 500mL, 100mL; e) Single-mark pipettes. 1mL, 2mL. 6.Reagents and Materials Reagents and materials shall comply with the relevant provisions of Chapter 3 of GB/T 2374-2007. a) Acidic solution of dimethylformamide (DMF). Add 1 mL of concentrated sulfuric acid to each liter of DMF and mix thoroughly. ...