GB 4806.12-2022National food safety standard - Bamboo and wood materials and products for food contact (English PDF)

1 Scope

This Standard applies to bamboo and wood materials and products for food contact.

2 Terms and definitions

3 Basic requirements

Bamboo and wood materials and products for food contact shall comply with the provisions of GB 4806.1.

4 Technical requirements

5 Other

Appendix A Determination of sulfur dioxide migration in bamboo and wood materials and products for food contact

A.1 Principle Select water as the food simulant. The specimen is subjected to migration test. The sulfur dioxide in the specimen migrates to the water. In a closed device, acidify and distill the test solution, to release the sulfur dioxide therein.

A.2 Reagents and materials Carry out in accordance with Clause 3 of GB 31604.32-2016 first method (titration method).

A.3 Instruments and equipment Carry out in accordance with Clause 4 of GB 31604.32-2016 first method (titration method); in which the iodine volumetric flask is changed to a pear-shaped flask; the all-glass distillation device is shown in Figure A.1.

A.4 Analytical procedure A.5 Results and presentation The migration of sulfur dioxide in the specimen is calculated according to formula (A.1).

A.6 Precision When the amount of sulfur dioxide migration is not higher than 5 mg/kg, the absolute difference between two independent test results obtained under repeatability conditions must not exceed 20% of the arithmetic mean.

A.7 Other The limit of quantification for the migration of sulfur dioxide in food simulant in this method is 1.0 mg/kg.

Appendix B Determination of thiabendazole, o-Phenylphenol, imazalil and biphenyl in bamboo and wood materials and products for food contact

B.1 Principle Take a representative sample; after crushing, use methanol to extract; rotary evaporate to dryness. Use methanol to make up to volume; after filtering, use high-performance liquid chromatograph equipped with diode array detector or UV detector for detection;

use external standard method to quantify.

B.2 Reagents and materials B.3 Instruments and equipment B.4 Analytical procedure