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GB/T 2910.1-2009 English PDF (GBT2910.1-2009)

GB/T 2910.1-2009 English PDF (GBT2910.1-2009)

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

GB/T 2910.1-2009
National Standard
of the People’s Republic of China
ICS 59. 080. 01
W 04
GB/T 2910.1-2009 / ISO 1833-1.2006
Partially replacing GB/T 2910-1997
Textiles - Quantitative Chemical Analysis –
Part 1. General Principles of Testing
(ISO 1833-1.2006, IDT)
ISSUED ON. JUNE 15, 2009
Jointly Issued by. General Administration of Quality Supervision,
Inspection and Quarantine;
Standardization Administration of the People's
Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 6
1 Scope ... 8
2 Normative References ... 8
3 Terms and Definitions ... 8
4 Principle ... 8
5 Reagents ... 9
6 Apparatus ... 9
7 Conditioning and Testing Atmosphere ... 9
8 Sampling and Pre-treatment of Sample ... 9
9 Procedure ... 10
10 Calculation and Expression of Results ... 11
11 Precision of the Methods ... 13
12 Test Report ... 13
Appendix A (Informative) Methods for the Removal of Non-fibrous
Matter... 15
Appendix B (Informative) Method of Quantitative Analysis by Manual
Separation ... 23
Bibliography ... 26
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);
— 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.
Textiles - Quantitative Chemical Analysis –
Part 1. General Principles of Testing
1 Scope
This Part of GB/T 2910 specifies a common method for the quantitative chemical analysis of various binary mixtures of fibres.
This method and the methods described in the other parts of ISO 1833 are applicable, in general, to fibres in any textile form. Where certain textile forms are excepted, these are listed in the scope of the appropriate part.
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. However, parties to agreements based on this Part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. GB/T 10629 Textiles — Preparation of laboratory test samples and test specimens for chemical testing (GB/T 10629-2009, ISO 5089.1997, MOD)
3 Terms and Definitions
For the purposes of this Part of GB/T 2910, the following terms and definitions apply. 3.1
Non-fibrous matter
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. Where relevant, the fibre in the larger proportion is removed first.
5 Reagents
Use only reagents of recognized analytical grade.
5.1 Light petroleum, re-distilled, distilling between 40°C and 60°C.
5.2 Distilled or deionized water.
6 Apparatus
6.1 Glass filter crucible, capacity 30 ml to 40 ml, with sealed-in sintered disk filter with pore size of 90 µm to 150 µm.
The crucible shall be provided with either a ground glass stopper or a watch-glass cover.
Note. In place of a glass filter crucible, any other apparatus giving identical results may be used. 6.2 Vacuum flask.
6.3 Desiccator containing self-indicating silica gel.
6.4 Ventilated oven for drying specimens at (105 ± 3)°C.
6.5 Analytical balance with a resolution of 0.000 2 g or better.
6.6 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
8.1 Sampling
Take a laboratory test sample, as described in GB/T 10629, that is representative of the laboratory bulk sample and sufficient to provide all the specimens, each of at least and/or the percentage addition to the insoluble component for non-fibrous matter. The percentage of the second component (P2A) is equal to (100 – PA).
Where a special pre-treatment has been used, the values of b1 and b2 should be determined, if possible, by submitting each of the pure fibre constituents to pre- treatment applied in the analysis. Pure fibres are those free from all non-fibrous material except that which they normally contain (either naturally or because of the manufacturing process), in the state (unbleached, bleached) in which they are found in the material to be analyzed.
11 Precision of the Methods
The precision indicated in individual parts of ISO 1833 relates to the reproducibility. This refers to the reliability, i.e. the closeness of agreement between experimental values obtained by operators in different laboratories or at different times, using the same method on specimens of an identical, consistent mixture.
The reproducibility is expressed by confidence limits of the results for a confidence level of 95%, i.e. the difference between two results in a series of analyses made in different laboratories would be exceeded only in five cases out of 100, when the standard method is applied to an identical consistent mixture.
12 Test Report
The test report shall specify the following.
a) reference to this Part;
b) whether the result relates to the overall composition of the material or to an individual component of the assembly;
c) details of any special treatment for the removal of size or finish given in addition to the specified pre-treatmen...

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