GB/T 2910.19-2009 English PDF (GBT2910.19-2009)

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GB/T 2910.19-2009: Textiles -- Quantitative chemical analysis -- Part 19: Mixtures of cellulose fibres and asbestos (method by heating)
GB/T 2910.19-2009
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.01
W 04
GB/T 2910.19-2009 / ISO 1833-19.2006
Partially replacing GB/T 2910-1997
Textiles - Quantitative chemical analysis - Part 19.Mixtures
of cellulose fibers and asbestos (method by heating)
(ISO 1833-19.2006, IDT)
ISSUED ON. JUNE 15, 2009
IMPLEMENTED ON. JANUARY 01, 2010
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
National Standardization Administration.
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative references... 6
3 Principle... 6
4 Reagents... 7
5 Equipment... 7
6 Sampling... 7
7 Test steps... 7
8 Calculation and expression of results... 7
Foreword
GB/T 2910 "Textiles - Quantitative Chemical Analysis" includes the following parts.
- Part 1.General principles of testing;
- Part 2.Ternary fiber mixture;
- Part 3.Mixtures of acetate and certain other fibres (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 fibres (method using sodium
zincate);
- Part 6.Mixtures of viscose or certain types of cupro or modal or lyocell and cotton
fibres (method using formic acid and zinc chloride);
- Part 7.Mixtures of polyamide and certain other fibres (method using formic acid);
- Part 8.Mixtures of acetate and triacetate fibres (method using acetone);
- Part 9.Mixtures of acetate and triacetate fibres (method using benzyl alcohol);
- Part 10.Mixtures of triacetate or polylactide and certain other fibres (method using
dichloromethane);
- Part 11.Mixtures of cellulose and polyester fibres (method using sulfuric acid);
- Part 12.Mixtures of acrylic, certain modacrylic, certain chlorofibres, certain
elastanes and certain other fibres (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 chlorofibres (method using acetic acid);
- Part 15.Mixtures of jute and certain animal fibres (method by determining nitrogen
content);
- Part 16.Mixtures of polypropylene and certain other fibres (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);
Textiles - Quantitative chemical analysis - Part 19.Mixtures
of cellulose fibers and asbestos (method by heating)
Safety precautions. When cutting yarn or fabric containing asbestos, safety
precautions shall be taken to avoid inhalation of asbestos dust.
1 Scope
This Part of GB/T 2910 specifies the method for determining the cellulose fiber content
in a two-component mixture consisting of the following fibers, by heating method.
- Cotton or regenerated cellulose fiber
AND
- Chrysotile and crocidolite.
If the stakeholders agree, this Part is also applicable to other types of asbestos.
Note. This method is different in principle from the selective dissolution of GB/T 2910.1.
2 Normative references
The clauses in the following documents become the clauses of this Part through
reference in this Part of GB/T 2910.For dated references, all subsequent amendments
(excluding errata) or revisions are not applicable to this Part. However, parties to an
agreement based on this Part are encouraged to investigate whether the latest versions
of these documents can be used. For undated references, the latest versions apply 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
Remove cellulose fibers from a mixture of known dry mass by heating at (450 ± 10) °C
for 1 h. Weigh the residue. Calculate its dry mass fraction of the mixture using the
corrected mass. Calculate the mass fraction of cellulose fibers from the difference.
Note. It is not necessary to remove non-fibrous materials in advance.