GB/T 2910.1-2009Textiles -- Quantitative chemical analysis -- Part 1: General principles of testing (English PDF)

Foreword

GB/T 2910 "Textiles — Quantitative Chemical Analysis" consists of following parts.

— Part 1.General Principles of Testing;

— Part 2.Ternary Fibre Mixtures;

— Part 3.Mixtures of Acetate and Certain Other Fibres (Method Using Acetone);

— Part 4.Mixtures of Certain Protein and Certain Other Fibres (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 Modacrylics, Certain Chlorofibres, Certain

Elastanes and Certain Other Fibres (Method Using Dimethylformamide);

— Part 13.Mixtures of Certain Chlorofibres and Certain Other Fibres (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 Fibres and Certain Other Fibres (Method

Using Xylene);

— Part 17.Mixtures of Chlorofibres (homopolymers of Vinyl Chloride) and Certain

Other Fibres (Method Using Sulfuric Acid);

— Part 18.Mixtures of Silk and Wool or Hair (Method Using Sulfuric Acid);

— Part 19.Mixtures of Cellulose Fibres and Asbestos (Method by Heating);

— Part 20.Mixtures of Elastane and Certain Other Fibres (Method Using

Dimethylacetamide);

— Part 21.Mixtures of Chlorofibres, Certain Modacrylics, Certain Elastanes,

Acetates, Triacetates and Certain Other Fibres (Method Using Cyclohexanone);

— Part 22.Mixtures of Viscose or Certain Types of Cupro or Modal or Lyocell and

Flax Fibres (Method Using Formic Acid and Zinc Chlorate);

— Part 23.Mixtures of Polyethylene and Polypropylene (Method Using

Cyclohexanone)

— Part 24.Mixtures of Polyester and Some Other Fibres (Method Using Phenol

and Tetrachloroethane);

— Part 101.Mixtures of Soybean Protein Composite Fibre and Certain Other Fibers.

This Part is Part 1 of GB/T 2910.

GB/T 2910-1997 is replaed by following standards. GB/T 2910.1, GB/T 2910.3, GB/T

2910.4, GB/T 2910.6, GB/T 2910.7, GB/T 2910.8, GB/T 2910.9, GB/T 2910.10, GB/T

2910.11, GB/T 2910.12, GB/T 2910.13, GB/T 2910.14, GB/T 2910.15, GB/T 2910.16,

GB/T 2910.17, GB/T 2910.18, GB/T 2910.19, and GB/T 2910.22.

This Part is identical to ISO 1833-1.2006 "Textiles — Quantitative Chemical Analysis -

Part 1.General Principles of Testing". Compared with ISO 1833-1.2006, this Part has

the following editorial changes.

— The international standards in "Normative References" were replaced by the

corresponding Chinese standards;

— Foreword of the international standard was deleted.

This Part replaces Chapter 4 of GB/T 2910-1997 "Textile — Binary Fibre Mixtures —

Quantitative Chemical Analysis". The main differences between this Part and Chapter

4 of GB/T 2910-1997 are as follows.

— The term and definition of "non-fibrous matter" was added (see Chapter 3);

— "Conditioning and Testing Atmosphere" was added (see Chapter 7);

— The chapter of "Test Results" was cancelled, which is incorporated into

Introduction;

— Original Appendix A "Tables for the Convention Moisture Regains of Textiles"

was deleted; and Appendix A "Methods for the Removal of Non-fibrous Matter"

was added;

— Appendix B was added.

Appendix A and Appendix B of this Part are informative.

This Part was proposed by China National Textile and Apparel Council.

This Part shall under the jurisdiction of Subcommittee 1 on Basic Standard of National

Technical Committee 209 on Textiles of Standardization Administration of China

(SAC/TC 209/SC 6).

Chief drafting organizations of this Part. China National Textiles Quality Supervision

Testing Center, and Standardization Research Institute of Textile Industry.

Chief drafting staff of this Part. Yan Chunhong.

Historical editions of GB/T 2910 are as follows.

— GB/T 2910-1982;

— GB/T 2910-1997.

1 Scope

This Part of GB/T 2910 specifies a common method for the quantitative chemical

analysis of various binary mixtures of fibres.

2 Normative References

The following normative documents contain provisions which, through reference in this

text, constitute provisions of this Part of GB/T 2910.For dated references, subsequent

amendments or revisions of these publications do not apply.

3 Terms and Definitions

For the purposes of this Part of GB/T 2910, the following terms and definitions apply.

Processing aids such as lubricants and sizes (but excluding jute-batching oils), and

naturally occurring non-fibrous substances.

4 Principle

After the identification of the components of a mixture, one component is removed,

usually by selective solution, the insoluble residue is weighed, and the proportions of

soluble component are calculated from the loss in mass.

5 Reagents

Use only reagents of recognized analytical grade.

6 Apparatus

The crucible shall be provided with either a ground glass stopper or a watch-glass

cover.

Soxhlet extraction apparatus, of sufficient size to give a volume, in milliliters,

equal to 20 times the mass, in grams, of the specimen, or any other apparatus giving

identical results.

7 Conditioning and Testing Atmosphere

Because dry masses are determined, it is unnecessary to condition the specimen. The

analysis is carried out under ordinary room conditions.

8 Sampling and Pre-treatment of Sample

Extract the air-dry sample in a Soxhlet apparatus with light petroleum for 1 h at a

minimum rate of six cycles per hour. Allow the light petroleum to evaporate from the

sample. Soak the specimen in cold water for 1 h, and then in water at (65 ± 5)°C for a

further 1 h.

9 Procedure

Conduct all drying operations for not less than 4 h and not more than 16 h at (105 ±

3)°C in a ventilated oven with the oven door closed throughout.

Note. The specimen should be dried until constant mass is achieved.

Conduct all cooling operations until complete cooling is attained, and in any case for

not less than 2 h with the desiccator beside the balance.

10 Calculation and Expression of Results

Express the mass of the insoluble component as a percentage of the total mass of

fibre in the mixture.

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