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GB 31604.3-2016 PDF English


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GB 31604.3-2016English70 Add to Cart 0-9 seconds. Auto-delivery. Method for analysis of hygienic standard of polyethylene resin for food packaging Valid
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GB 31604.3-2016: PDF in English

GB 31604.3-2016 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA National Food Safety Standard – Food Contact Materials and Products – Determination of Resin Drying Weight Loss ISSUED ON. AUGUST 31, 2016 IMPLEMENTED ON. MARCH 1, 2017 Issued by. National Health and Family Planning Commission of PRC Table of Contents Foreword ... 3 1 Scope ... 4 2 Principle ... 4 3 Apparatus ... 4 4 Analytical Procedures ... 4 5 Expression of Analytical Results ... 5 6 Precision ... 5 National Food Safety Standard – Food Contact Materials and Products – Determination of Resin Drying Weight Loss 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 ......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.