GB/T 2910.22-2009 PDF English
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Textiles -- Quantitative chemical analysis -- Part 22: Mixtures of viscose or certain types of cupro or modal or lyocell and flax of ramie fibres (method using formic acid and zinc chloride)
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GB/T 2910.22-2009: Textiles -- Quantitative chemical analysis -- Part 22: Mixtures of viscose or certain types of cupro or modal or lyocell and flax of ramie fibres (method using formic acid and zinc chloride)
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GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.01
W 04
Partially replacing GB/T 2910-1997
Textiles – Quantitative Chemical Analysis – Part 22.
Mixtures of Viscose or Certain Types of Cupro or
Modal or Lyocell and Flax of Ramie Fibres (Method
Using Formic Acid and Zinc Chloride)
Issued on. JUNE 15, 2009
Implemented on. JANUARY 1, 2010
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Principles... 5
4 Reagents... 6
5 Apparatus... 6
6 Test Procedures... 6
7 Result Calculation and Expression... 7
8 Precision... 7
Foreword
GB/T 2910 Textiles – Quantitative Chemical Analysis includes the following parts.
--- Part 1.General Principle 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);
--- Part 19.Mixtures of Cellulose Fibres and Asbestos (Method by Heating);
--- Part 20.Mixtures of Elastane and Some Other Fibers (Method Of Using
Dimethylacetamide);
--- Part 21.Mixtures of Chlorofibers, Certain Modacrylics, Certain Elastanes, Acetates,
Triacetates and Certain Other Fibers (Method Using Cyclohexanone);
--- Part 22.Mixtures of Viscose or Certain Types of Cupro or Modal or Lyocell and Flax
of Ramie Fibres (Method Using Formic Acid and Zinc Chloride);
--- Part 23.Mixtures of Polyethylene and Polypropylene (Method Using
Cyclohexanone);
--- Part 24.Mixtures of Polyester and Some Other Fibers (Method Using Phenol and
Tetrachloroethane);
--- Part 101.Mixtures of Soybean Protein Composite Fibre and Certain Other Fibers.
This Part belongs to Part 22 of GB/T 2910.
GB/T 2910-1997 is replaced by the 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 together with GB/T 2910.6 replaced the Chapter 7 of GB/T 2910-1997 Textile
– Binary Fiber Mixtures – Quantitative Chemical Analysis; compared with the Chapter
7 of GB/T 2910-1997, the differences are as follows.
--- Delete cotton from the scope.
This Part was proposed by China National Textile and Apparel Council.
This Part shall be under the jurisdiction of Basic Branch of National
Technical Committee for Standardization of Textile (SAC/TC 209/SC 1).
Drafting organizations of this Part. State Textile Products Quality Supervision and
Inspection Center, Shenzhen Testing Center of China Textile Academy.
Chief drafting staffs of this Part. Wang Ying, Chen Pei, Li Chun, and Anli.
The historical editions replaced by GB/T 2910 are as follows.
--- GB/T 2910-1982;
--- GB/T 2910-1997.
Textiles – Quantitative Chemical Analysis – Part 22.
Mixtures of Viscose or Certain Types of Cupro or
Modal or Lyocell and Flax of Ramie Fibres (Method
Using Formic Acid and Zinc Chloride)
1 Scope
This Part of GB/T 2910 specifies using formic acid and zinc chloride method to
determine, after removing the non-fibrous substances, the fiber contents in the binary
mixtures of viscose, certain type of cupro, modal, lyocell, flax, and ramie.
This Part is not applicable to the mixture the mixtures that can’t be dissolved
completely due to the viscose, certain type of cupro, model, modal, and lyocell
containing the durable finishing agents and reactive dyes which can’t be completely
removed.
Safety warning. the substances or methods used in this Part may be hazardous
to human health and environment if used improperly.
2 Normative References
The provisions in following documents become the provisions of this Part through
reference in this Part of GB/T 2910.For dated references, the subsequent
amendments (excluding corrigendum) or revisions do not apply to this Part, however,
parties who reach an agreement based on this Part are encouraged to study if the
latest versions of these documents are applicable. For undated references, the latest
edition of the referenced document applies.
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 Principles
Use formic acid and zinc chloride reagents to dissolve and remove the viscose, certain
type of cupro, model, modal, and lyocell from the mixture with known dry mass; collect
the residues, clean, dry and weigh;
4 Reagents
Use the reagents specified in GB/T 2910.1 as well as 4.1 and 4.2 in this Part.
4.1 Formic acid/zinc chloride solution
20g of anhydrous zinc chloride and 68g of anhydrous formic acid were added water to
prepare 100g of formic acid/zinc chloride solution.
5 Apparatus
Use the apparatus specified in GB/T 2910.1 and 5.1 in this Part.
5.1 Conical flask with stopper with capacity no less than 200mL.
6 Test Procedures
It shall be performed as per the procedures stipulated in GB/T 2910.1.40°C Method
and 70°C Method can be selected as required.
6.1 40°C Method
Place the specimen quickly into the conical flask containing the formic acid/zinc
chloride solution with a preheated temperature of 40°C±2°C; add 100mL of formic
acid/zinc chloride solution to each gram of the specimen (4.1), tighten the cap. Shake
the conical flask, dip the specimen, stand for 2.5h at 40°C±2°C; shake once every
45min, totally shake twice.
6.2 70°C Method
Place the specimen quickly into the conical flask containing the formic acid/zinc
chloride solution with a preheated temperature of 70°C±2°C; add 100mL of formic
acid/zinc chloride solution to each gram of the specimen (4.1), tighten the cap. Shake
the conical flask, dip the specimen, stand for 20min±1min at 70°C±2°C, during which
shake twice.
7 Result Calculation and Expression
The result calculation and expression shall conform to the provisions of GB/T 2910.1.
Value d of flax is 1.07; Value d of ramie is 1.00.
8 Precision
For the homogeneous mixture of textile materials, the confidence limit of this Method
shall not exceed ±1 at the 95% confidence level.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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