GB 31604.6-2016 English PDF

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GB 31604.6-2016: National Food Safety Standard -- Food Contact Materials and Articles -- Determination of Ignition Residue in Resin
GB 31604.6-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
GB/T 31604.6-2016
National Food Safety Standard –
Food Contact Materials and Products –
Determination of Burning Residues 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 Apparatus ... 4
5 Expression of Analytical Results ... 5
6 Precision ... 5
National Food Safety Standard –
Food Contact Materials and Products –
Determination of Burning Residues in Resin
1 Scope
This Standard specifies the determination of burning residues in the resin of food
contact materials and products.
This Standard is applicable to the determination of burning residues in the polyethylene
resin of food contact materials and products.
2 Principle
After carbonization, the specimen is calcinated at 800°C, then calculate the mass of
residues.
3 Apparatus
3.1 Balance. sensibility of 0.1mg.
3.2 High-temperature oven. the maximum application temperature is ≥900°C.
3.3 Dryer.
3.4 Crucible. quartz crucible or porcelain crucible.
4 Analytical Procedures
4.1 Sampling method
Operate as per GB 5009.156.
4.2 Specimen determination
Weigh 5g~10g (accurate to 0.1mg) of particle specimen; place it into the constant-
weight crucible that has been burnt to 800°C±25°C; carefully carbonize to smoke-free;
then place into 800°C±25°C high-temperature oven to burn for 2h; cool off to about