GB/T 2910.6-2009: Textiles -- Quantitative chemical analysis -- Part 6: Mixtures of viscose or certain types of cupro or modal or lyocell and cotton fibers (method using formic acid and zinc chloride)

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Scope

This part of GB/T 2910 specifies a method, using a mixture of formic acid and
zinc chloride, to determine the percentage of cotton, after removal of non-
fibrous matter, in textiles made of binary mixtures of viscose or some cupro,
modal and lyocell fibres with cotton.
If a cupro or modal or lyocell fibre is found to be present, a preliminary test is
carried out to see whether it is soluble in the reagent.
The method is not applicable to mixtures in which the cotton has suffered
extensive chemical degradation, nor when the viscose, cupro, modal or lyocell
fibre is rendered incompletely soluble by the presence of certain permanent
finishes or reactive dyes that cannot be removed completely.
WARNING - This Part of GB/T 2910 calls for the use of
substances/procedures that may be injurious to the health/environment if
appropriate conditions are not observed. It refers only to technical
suitability and does not absolve the user from legal obligations relating
to health and safety/environment at any stage.

Basic Data

Standard ID	GB/T 2910.6-2009 (GB/T2910.6-2009)
Description (Translated English)	Textiles -- Quantitative chemical analysis -- Part 6: Mixtures of viscose or certain types of cupro or modal or lyocell and cotton fibers (method using formic acid and zinc chloride)
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	W04
Classification of International Standard	59.080.01
Word Count Estimation	9,958
Date of Issue	2009-06-15
Date of Implementation	2010-01-01
Older Standard (superseded by this standard)	GB/T 2910-1997
Quoted Standard	GB/T 2910.1
Adopted Standard	ISO 1833-6-2007, 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 determination to go after unless viscose fiber material using formic acid/zinc chloride, modal or lyocell fiber and cotton fiber content of the two components of a mixture of methods, certain copper ammonia fiber. If the sample has a copper ammonia fiber, when modal or lyocell fibers exist, you should test whether pre-soluble reagents. This section does not apply to mixtures of cotton fiber has been seriously chemical degradation, does not apply to viscose fiber, copper ammonia fiber, presence can not be completely removed durability finishing agents or dyes or modal or lyocell fibers, resulting in the not completely dissolved. WARNING: Using GB/T 2910 this part of the regular staff should have practical experience in laboratory work.