GB/T 2910.21-2009: Textiles -- Quantitative chemical analysis -- Part 21: Mixtures of chlorofibre, certain modacrylics, certain elastane, acetates, triacetates and certain other fibers (method of using dimethylacetamide)

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Scope

This Part of GB/T 2910 specifies the method for determining the content of chlorinated
fibers, modified polyacrylonitrile fibers, elastic fibers, acetate fibers, triacetate fibers in
a mixture composed of the following fibers after removing non-fiber substances by the
cyclohexanone method.
- Acetate fibers, triacetate fibers, chlorinated fibers, certain modified
polyacrylonitrile fibers, certain elastic fibers
AND
- Wool, animal hair, silk, cotton, cuprammonium fibers, modal fibers, viscose fibers,
polyamide fibers, polyacrylonitrile fibers, glass fibers.
When containing modified polyacrylonitrile fibers or elastic fibers, preliminary tests
must be conducted to determine whether the fibers are completely soluble in the reagent.
The methods specified in GB/T 2910.13 or GB/T 2910.17 may also be used to analyze
mixtures containing chlorinated fibers.

Basic Data

Standard ID	GB/T 2910.21-2009 (GB/T2910.21-2009)
Description (Translated English)	Textiles -- Quantitative chemical analysis -- Part 21: Mixtures of chlorofibre, certain modacrylics, certain elastane, acetates, triacetates and certain other fibers (method of using dimethylacetamide)
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	W04
Classification of International Standard	59.080.01
Word Count Estimation	9,911
Date of Issue	2009-06-15
Date of Implementation	2010-01-01
Quoted Standard	GB/T 2910.1
Adopted Standard	ISO 1833-21-2006, IDT
Regulation (derived from)	National Standard Approval Announcement 2009 No.8 (Total No.148)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard specifies the cyclohexanone-determination to go unless fibrous substances, mixture of chlorine fiber consists of fibers, acetate fibers and methods triacetate content modacrylic fiber, , elastic fibers: -acetate fibers, triacetate, chlorine fiber, certain modified polyacrylonitrile fibers, certain elastic fiber and-wool, animal hair, silk, cotton, copper ammonia fiber, modal fiber, viscose fiber, polyamide fiber, polyacrylonitrile fibers and glass fibers. When containing modified polyacrylonitrile fibers or elastic fibers, should be pre- tested to determine whether the fiber is completely soluble in the reagent. You can also use GB/T 2910. 13 or GB/T 2910. 17 requirement to analyze a mixture of chlorine -containing fibers.