Determination of the protein content of the protein viscose fiber
1 Scope
This standard specifies two test methods for determining the protein content in the protein viscose fiber, including Method A - Kjeldahl method and Method B - sodium hypochlorite method.
This standard is applicable to the determination of protein content in protein viscose fiber.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 601 Chemical reagent - Preparations of reference titration solutions
GB/T 4146.1 Textiles - Man-made fibres - Part 1: Generic names
GB/T 4146.3 Textiles - Man-made fibers - Part 3: Terms of inspection
GB/T 6502 Sampling method of man-made filament yarns
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB/T 14334 Sampling method for man-made staple fibres
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 4146.1 and GB/T 4146.3 and the following apply.
3.1
protein content of the protein viscose fiber
mass fraction of protein in protein viscose fiber
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4 Test methods
4.1 Method A (Kjeldahl method)
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Test methods
5 Test report
