GB/T 2910.5-2009 PDF English
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Textiles -- Quantitative chemical analysis -- Part 5: Mixtures of viscose, cupro or modal and cotton fibers (method using sodium zincate)
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GB/T 2910.5-2009: PDF in English (GBT 2910.5-2009) GB/T 2910.5–2009 \]
ICS 59.080.01
W 04
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
GB/T 2910.5-2009 / ISO 1833-5.2006
Textiles - Quantitative chemical analysis - Part 5.
Mixtures of viscose, cupro or modal and cotton
fibres (method using sodium zincate)
(ISO 1833-5. 2006, IDT)
ISSUED ON. JUNE 15, 2009
IMPLEMENTED ON. JANUARY 01, 2010
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Principle ... 5
4 Reagents ... 6
5 Apparatus ... 6
6 Test procedure ... 6
7 Calculation and expression of results ... 7
Foreword
GB/T 2910 “Textiles-Quantitative Chemical Analysis” consists of the following parts.
- Part 1. General principles of testing;
- Part 2. Ternary fiber mixtures;
- Part 3. Mixtures of acetate and certain other fibers (method using acetone);
- Part 4. Mixtures of certain protein and certain other fibers (method using
hypochlorite);
- Part 5. Mixtures of viscose, cupro or modal and cotton fibers (method using
sodium zincate);
- Part 6. Mixtures of viscose or certain types of cupro or modal or lyocell and cotton
fibers (method using formic acid and zinc chloride);
- Part 7. Mixtures of polyamide and certain other fibers (method using formic acid);
- Part 8. Mixtures of acetate and triacetate fibers (method using acetone);
- Part 9. Mixtures of acetate and triacetate fibers (method using benzyl alcohol);
- Part 10. Mixtures of triacetate or polylactide and certain other fibers (method using
dichloromethane);
- Part 11. Mixtures of cellulose and polyester fibers (method using sulfuric acid);
- Part 12. Mixtures of acrylic, certain modacrylics, certain chlorofibers, certain
elastanes and certain other fibers (method using dimethylformamide);
- Part 13. Mixtures of certain chlorofibers and certain other fibers (method using
carbon disulfide/acetone);
- Part 14. Mixtures of acetate and certain chlorofibers (method using acetic acid);
- Part 15. Mixtures of jute and certain animal fibers (method by determining nitrogen
content);
- Part 16. Mixtures of polypropylene fibers and certain other fibers (method using
xylene);
- Part 17. Mixtures of chlorofibers (homopolymers of vinyl chloride) and certain
other fibers (method using sulfuric acid);
- Part 18. Mixtures of silk and wool or hair (method using sulfuric acid);
- Part 19. Mixtures of cellulose fibers and asbestos (method by heating);
- Part 20. Mixtures of elastane and some other fibers (method of using
dimethylacetamide);
Textiles - Quantitative chemical analysis - Part 5.
Mixtures of viscose, cupro or modal and cotton fibres
(method using sodium zincate)
1 Scope
This part of GB/T 2910 specifies a method, using sodium zincate, to determine the
percentage of viscose, cupro or modal fibre, after removal of non-fibrous matter, in
textiles made of binary mixtures of
- viscose or most of the current cupro or modal fibres, and
- raw, scoured, kiered or bleached cotton.
Where a cupro or modal fibre is present, a preliminary test should be carried out to
see whether it is soluble in the reagent.
This part is not applicable to the mixtures in which the cotton has suffered extensive
chemical degradation. It is also not applicable to viscose, cupro or modal fibre in
which there exists un-removable durability finishing agent or reactive dyes, so that it
cannot be completely dissolved.
2 Normative references
The articles contained in the following documents have become this part of GB/T
2910 when they are quoted herein. For the dated documents so quoted, all the
modifications (excluding corrections) or revisions made thereafter shall not be
applicable to this part. For the undated documents so quoted, the latest editions shall
be applicable to this part.
GB/T 2910.1 Textiles - Quantitative chemical analysis - Part 1. General principles of
testing (GB/T 2910.1-2009, ISO 1833-1. 2006, IDT)
3 Principle
The viscose, cupro or modal fibre is dissolved from a known dry mass of the mixture,
with sodium zincate solution. The residue is collected, washed, dried and weighed; its
corrected mass is expressed as a percentage of the dry mass of the mixture. The
percentage of viscose, cupro or modal fibre is found by the difference.
vigorously on the mechanical shaker for (20 ± 1) min. Filter the contents of the flask
through the weighed filter crucible. Apply suction to the crucible to remove excess
liquor, again replace the residue in the flask by means of forceps, add 100 mL of
ammonia solution, and shake the flask for 5 min on the mechanical shaker. Filter the
contents of the flask through the same weighed filter crucible and wash any fibres
from the flask into the crucible with water. Wash the crucible and residue with 100 mL
of acetic acid solution, and then thoroughly with water. Do not apply suction until each
washing liquor has drained under gravity. Finally, drain the crucible using suction, dry
the crucible and residue, then cool and weigh them.
7 Calculation and expression of results
Calculate the results as described in the general instructions of GB/T 2910.1. The
value of d for raw, scoured, kiered, or bleached cotton is 1,02.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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