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GB 31604.3-2016Method for analysis of hygienic standard of polyethylene resin for food packaging (English PDF)

食品安全国家标准食品接触材料及制品树脂干燥失重的测定

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Issued by

National Health and Family Planning Commission of PRC

Level / Type

National · Mandatory

Issue date

August 31, 2016

Implementation date

March 1, 2017

Scope

GB 31604.3-2016 is the English-translated version of 食品安全国家标准食品接触材料及制品树脂干燥失重的测定.

GB 31604.3-2016 is the Chinese standard "Method for analysis of hygienic standard of polyethylene resin for food packaging". Its scope clause reads: This Standard specifies the determination of resin drying weight loss in food contact materials and products.

This Standard is applicable to determination of polyethylene resin and polystyrene resin drying weight loss in food contact materials and products. Its clauses include principle; apparatus; analytical procedures.

It was issued by the National Health and Family Planning Commission of PRC on 2016-08-31 and took effect on 2017-03-01.

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Document preview — GB 31604.3-2016

National Standard of the People's Republic of China

Issued by: National Health and Family Planning Commission of PRC

Foreword...3
1 Scope...4
2 Principle...4
3 Apparatus...4
4 Analytical Procedures...4
5 Expression of Analytical Results...5
6 Precision...5

1 Scope

This Standard specifies the determination of resin drying weight loss in food contact materials and products.

This Standard is applicable to determination of polyethylene resin and polystyrene resin drying weight loss in food contact materials and products.

2 Principle

The weight loss on drying polyethylene resin at 90°C~95°C, polystyrene resin at 100°C;

namely, the drying weight loss, it indicates the existence of volatile substances in this condition.

3 Apparatus

3.1 Balance. sensibility is 0.1g.

3.2 Electrothermal constant temperature dry box.

3.3 Flat weighting bottle. diameter 40mm.

4 Analytical Procedures

4.1 Sampling method

Operate as per GB 5009.156.

4.2 Determination of specimen

4.2.1 Polyethylene resin

Weigh 5g~10g (accurate to 0.1mg) of particle specimen, put into the constant-weight

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 5 pages — is available in the English PDF.

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