GB 5009.156-2016 English PDF (GB5009.156-2016)

This standard specifies the general principles of test, reagents and materials, equipment and instruments, sampling method and sample preparation methods, sample contact area, ratio between sample contact area and food simulant volume, sample cleaning and special treatment, test method, determination requirements of migration quantity, and result presentation requirements of the migration test pre-treatment method of food contact materials and their products.

GB 5009.156-2016
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
National food safety standard
General principle of migration test pre-treatment
method of food contact materials and their products
ISSUED ON. OCTOBER 19, 2016
IMPLEMENTED ON. APRIL 19, 2017
Issued by. National Health and Family Planning Commission of the PRC
Table of contents
Foreword ... 3
1 Scope ... 4
2 Terms and definitions ... 4
3 General principles of test ... 4
4 Reagents and materials ... 5
5 Equipment and instruments ... 7
6 Sampling and sample preparation method ... 8
7 Sample contact area ... 8
8 Ratio between sample contact area and food simulant volume (S/V) ... 10 9 Sample cleaning and special treatment ... 10
10 Test methods ... 11
11 Determination requirements of migration quantity ... 13
12 Results presentation requirements ... 13
Appendix A Requirements for fatty food simulant ... 15
Appendix B Holder and migration test basin ... 16
Appendix C Migration test temperature and time error ... 21
Appendix D Examples of determination methods for the area of special shape products ... 22
Foreword
This standard replaces GB/T 5009.156-2003 “General principles of soaking test method of food packaging materials and their products”.
As compared with GB/T 5009.156-2003, the main changes of this standard are as follows.
- CHANGE the standard name into “National food safety standard - General principle of migration test pre-treatment method of food contact materials and their products”;
- MODIFY the terms and definitions;
- ADD the general principles of test;
- ADD the reagents and materials;
- ADD the equipment and instrument;
- MODIFY the sampling and sample preparation methods;
- MODIFY the sample contact area;
- ADD the ration between sample contact area and food simulant volume;
- MODIFY the sample cleaning;
- MODIFY the test method;
- ADD the determination requirements for migration quantity;
- MODIFY the result presentation requirements;
- DELETE the “Appendix A. Sampling method of food packaging materials”
from the original standard;
- DELETE the “Appendix B. Soaking test items and test conditions” from the original standard;
- ADD the Appendix A, Appendix B, Appendix C, and Appendix D.
National food safety standard
General principle of migration test pre-treatment
method of food contact materials and their products
1 Scope
This standard specifies the general principles of test, reagents and materials, equipment and instruments, sampling method and sample preparation
methods, sample contact area, ratio between sample contact area and food simulant volume, sample cleaning and special treatment, test method,
determination requirements of migration quantity, and result presentation requirements of the migration test pre-treatment method of food contact materials and their products.
This standard applies to the migration test pre-treatment method of food contact materials and their products.
2 Terms and definitions
2.1 Migration test basin
It refers to the device used to install and fix the sample to be tested, and conduct the migration test pre-treatment after injecting the food simulant. 2.2 Hollow products
It refers to the products for which the depth from the product mouth along the horizontal plane to its internal lowest horizontal plane is more than 25 mm. 2.3 Flat products
It refers to the products for which the depth from the product mouth along the horizontal plane to its internal lowest horizontal plane is less than or equal to 25 mm.
3 General principles of test
3.1 This standard provides the migration test pre-treatment method of food contact materials and their products. The soaking solution as obtained through water is respectively (the allowable error is ± 20%). Ca2+, 16.4 mg/L; Mg2+, 3.3 mg/L; HCO3-, 44.0 mg/L; Cl-, 28.4 mg/L; SO42-, 13.0 mg/L; Na+, 16.0 mg/L. STORE it in a closed container; AND the shelf life shall be not more than 7 d. 4.2.12 0.1 mol/L hydrochloric acid solution. TAKE 9 mL of hydrochloric acid (4.1.17); ADD it into water and MAKE its volume reach to 1000 mL.
4.2.13 Artificial saliva. DISSOLVE 4.2 g of sodium bicarbonate (4.1.10), 0.5 g of sodium chloride (4.1.14), 0.2 g of potassium carbonate (4.1.15) and 30 mg of sodium nitrite (4.1.16) into water; DILUTE it to 900 mL. ADJUST the pH to 9.0. If necessary, ADD 0.1 mol/L hydrochloric acid solution (4.2.12) or 0.1 mol/L sodium hydroxide solution (4.2.7). TRANSFER it to a 1000 mL
volumetric flask; ADD water to make the volume reach to the mark.
5 Equipment and instruments
5.1 Balance
The sensitivity is 1 mg.
5.2 Sample holder
The sample holder shall be capable of supporting the sample, maintaining the separation between the samples, and ensuring that the sample is in complete contact with the simulant, AND its material shall be such as not affect the determination results of the migration quantity. As for the holder selection, SEE Figure B.1 and Figure B.2 in Appendix B; AND it may also use other holders complying with the requirements.
5.3 Glass rod and glass bead
It is used to fine-tune the liquid level of the food simulant so that the surface of the sample is completely immersed in the simulant; AND it may also use other appropriate methods.
5.4 Migration test basin
The migration test basin shall be free of leakage AND its material shall not affect the migration test results. The determination of volatile substances shall be carried out using a gas-tight migration test basin and a migration test basin with a smaller reserved space at the top. As for the types of the migration test basin, SEE Figure B.3 ~ Figure B.6 in Appendix B, AND it may also use other migration test basins complying with requirements.
5.5 Constant temperature equipment
In case of full immersion test, when the sample thickness less than or equal to 0.5 mm, the calculated area takes the single-sided area of the sample; when the sample thickness is more than 0.5 mm and less than or equal to 2 mm, the calculated area takes the sum of the positive side area and the negative side area, that is, the single-sided area multiplied by 2; when the sample thickness is greater than 2 mm, the calculated area takes the sum of the positive side area, the negative side area, and the side area.
7.5 Sample area in migration test basin method
The sample area is calculated as the area of the sample which is actually in contact with the food simulant or other chemical solvents.
7.6 Examples of methods for determining the area of products of
different shapes
As for the examples of the determination methods on the area of products of some special shapes not covered in 7.2 ~ 7.5, SEE Appendix D.
8 Ratio between sample contact area and food
simulant volume (S/V)
8.1 USE different test methods and SELECT appropriate S/V to conduct the migration test pre-treatment against the sample.
8.2 When the actual S/V or conventional S/V (6dm2 contact area corresponds to 1 L or 1 kg of food simulant) cannot be used for technical reasons, it may adjust the S/V to make the migration substance to be tested in the simulant reach to appropriate concentration, in order to satisfy the method testing requirements.
8.3 The sample S/V in the migration test pre-treatment shall ensure that in the entire test process, the concentration of the migration substances to be tested in the food simulant is always in an unsaturated state.
9 Sample cleaning and special treatment
9.1 Samples shall be clean AND free from contamination.
9.2 Samples shall be cleaned in accordance with the actual conditions of use. As for the samples which do not need cleaning before use (such as disposable constant temperature equipment which had reached to the test temperature, and CONDUCT the migration test in accordance with specified test conditions (temperature and time). As for the samples of the plastic film bags and composite bags and others, it shall use the surface expected to be in contact with the food as the test surface, place the bag into the beaker of appropriate size, add appropriate amount of food simulant which had reached to the test temperature into the bag, to make it contact with the region the area of which had been calculated, AND conduct the migration test pre-treatment in
accordance with the test conditions as specified for this sample.
10.2.2 Bagging method
Plastic films (bags) and composite packaging film (bags) may also use the bagging method. After sealing it, CUT one corner of the bag, to make an aperture of such size as able to accommodate the injection of the food
simulant; PLACE the sample bag into the sample holder (the holder as s...