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GB 31604.4-2016 PDF English

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GB 31604.4-2016: National Food Safety Standard -- Food Contact Materials and Articles -- Determination of volatiles in resins
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GB 31604.4-2016English70 Add to Cart 0-9 seconds. Auto-delivery National Food Safety Standard -- Food Contact Materials and Articles -- Determination of volatiles in resins Valid

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GB 31604.4-2016: National Food Safety Standard -- Food Contact Materials and Articles -- Determination of volatiles in resins


---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB31604.4-2016
GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA National Food Safety Standard – Food Contact Materials and Products – Determination of Volatile Substances in Resin 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 Reagents and Materials ... 4 4 Apparatus ... 4 5 Analytical Procedures ... 4 6 Expression of Analytical Results ... 5 7 Precision ... 6 National Food Safety Standard – Food Contact Materials and Products – Determination of Volatile Substances in Resin

1 Scope

This Standard specifies the determination of volatile substances in resin of food contact materials and products. This Standard is applicable to the determination of volatile substances in polystyrene resin of food contact materials and products.

2 Principle

At 138°C~140°C, under 85.3kPa, the loss weight of specimen after drying for 2h minus the mass of drying loss weight is the mass of the volatile substances.

3 Reagents and Materials

Butanone (C4H8O).

4 Apparatus

4.1 Balance. sensibility of 0.1mg. 4.2 Ultrasonic cleaning device. operating frequency of 35kHz. 4.3 Vacuum drying oven.

5 Analytical Procedures

5.1 Sampling method Operate as per GB 5009.156. 5.2 Drying weight loss ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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