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GB 31604.7-2016 English PDF (GB31604.7-2016)

GB 31604.7-2016 English PDF (GB31604.7-2016)

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GB 31604.7-2016: Food safety national standard -- Food contact materials and products -- Decolorization test

This Standard specifies the decoloring test method of food contact materials and products. This Standard is applicable to the decoloring test of food contact materials and products.
GB 31604.7-2016
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
National Food Safety Standard - Food Contact
Materials and Products ?€? Decolorization Test
ISSUED ON. AUGUST 31, 2016
IMPLEMENTED ON. MARCH 1, 2017
Issued by. National Health and Family Planning Commission of China
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Principle ... 4
3 Reagents and Materials ... 4
4 Analytical Procedures ... 4
5 Expression of Analytical Results ... 5
Foreword
This Standard replaced the determination of decoloring test stipulated in the following standards, such as GB/T 5009.60-2003 Method for Analysis of Hygienic Standard of Products of Polyethylene, Polystyrene and Polypropyrene for Food Packaging, GB/T 5009.61-2003 Method for Analysis of Hygienic Standard of Products of
Tripolycyanamide for Food Packaging, GB/T 5009.67-2003 Method for Analysis of Hygienic Standard of Product of Polyvinyl Chloride for Food Packaging, GB/T 5009.78- 2003 Method for Analysis of Hygienic Standard of Papers for Food Packaging. Compared with GB/T 5009.60-2003, GB/T 5009.61-2003, GB/T 5009.67-2003, GB/T 5009.78-2009, this Standard has the major changes as follows.
--- Modified the standard name into ?€?National Food Safety Standard on Decoloring Test of Food Contact Materials and Products?€?;
--- Modified the standard scope.
National Food Safety Standard - Food Contact
Materials and Products - Decolorization Test
1 Scope
This Standard specifies the decoloring test method of food contact materials and products.
This Standard is applicable to the decoloring test of food contact materials and products.
2 Principle
Observe the color change of the sample through wiping with solvent and immersing into soaking solution.
3 Reagents and Materials
Unless otherwise is specified, all reagents used in this method are analytically pure; water used is Class-II water stipulated in GB/T 6682.
3.1 Reagents
3.1.1 Anhydrous ethanol (C2H6O).
3.1.2 Ethanol solution (65+35). weight 65mL of anhydrous ethanol, add 35mL of water, mix evenly.
3.1.3 Vegetable oil. colorless or light-colored vegetable oil.
3.1.4 Soaking solution. operate as per the preparation of soaking solution stipulated in GB 5009.156.
3.2 Materials
Degreasing cotton.
4 Analytical Procedures
4.1 Sampling method

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