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SN/T 4668-2016 English PDF

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SN/T 4668-2016: Textiles for import and export--Qualitative analysis of fiber--Natural colored cotton--UV-Vis diffuse reflectance spectroscopy method
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
SN/T 4668-2016	English	229	Add to Cart	3 days [Need to translate]	Textiles for import and export--Qualitative analysis of fiber--Natural colored cotton--UV-Vis diffuse reflectance spectroscopy method	Valid	SN/T 4668-2016

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Basic data

Standard ID	SN/T 4668-2016 (SN/T4668-2016)
Description (Translated English)	Textiles for import and export--Qualitative analysis of fiber--Natural colored cotton--UV-Vis diffuse reflectance spectroscopy method
Sector / Industry	Commodity Inspection Standard (Recommended)
Classification of Chinese Standard	W55
Word Count Estimation	10,125
Date of Issue	2016-12-12
Date of Implementation	2017-07-01
Regulation (derived from)	State-Quality-Inspection-Accredidation (2016) No.590
Issuing agency(ies)	General Administration of Customs

SN/T 4668-2016: Textiles for import and export--Qualitative analysis of fiber--Natural colored cotton--UV-Vis diffuse reflectance spectroscopy method

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Textiles for import and export--Qualitative analysis of fiber--Natural colored cotton--UV-Vis diffuse reflectance spectroscopy method China's entry-exit inspection and quarantine industry standards Qualitative analysis of textile fibers imported and exported Natural colored cotton UV diffuse reflectance spectroscopy Published on.2016-12-12 2017-03-01 Implementation China The State Administration of Quality Supervision, Inspection and Quarantine issued

Foreword

This standard is written in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and managed by the National Certification and Accreditation Regulatory Commission. This standard was drafted by the People's Republic of China Zhejiang Entry-Exit Inspection and Quarantine Bureau Silk Inspection Center, Zhejiang University of Technology. The main drafters of this standard are. Zhao Dong, Dong Suoxi, Tang Zhengwei, Tang Zhirong, Chen Qikai, and Zhou Wenlong. Qualitative analysis of textile fibers imported and exported Natural colored cotton UV diffuse reflectance spectroscopy

1 Scope

This standard specifies the method for the qualitative determination of UV diffuse reflectance spectra of natural colored cotton fibers. This standard applies to the qualitative identification of single-component natural green cotton and natural brown cotton and dyed cotton fibers.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 2910.1 Quantitative chemical analysis of textiles. Part 1. General rules for testing

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Natural colored cotton naturalcolored cottonon When mature, it has green, brown and other colors of cotton fibers.

4 Principle

Natural colored cotton fibers contain natural pigments. These pigments are composed of a series of organic compounds with similar structural properties. In contrast, the components of dyed cotton fiber dyes are relatively single, and there is a significant difference in their UV-vis diffuse reflectance spectra. Therefore, cotton can be used The UV-vis diffuse reflectance spectra of fiber samples qualitatively identify natural colored cotton fibers and dyed cotton fibers.

5 Equipment

Ultraviolet spectrophotometer. with an integrating sphere attachment, the spectral range is not less than.200nm~900nm.

6 sampling

Take appropriate amount of fiber sample to cover the sample trough evenly, hand-pull, open, mix thoroughly and arrange the fibers into straight parallel bundles.

7 sample pretreatment method

General samples do not need to be pretreated. If non-fibrous substances such as grease, wax and other impurities are mixed in the sample, press GB/T 2910.1. The sample pretreatment method removes impurities.

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