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GB 4806.8-2022 English PDF (GB4806.8-2022)

GB 4806.8-2022 English PDF (GB4806.8-2022)

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GB 4806.8-2022: National Food Safety Standard - Food Contact Paper and Board Materials and Their Products

This document is applicable to food contact paper and board materials and their products.
GB 4806.8-2022
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
National Food Safety Standard - Food Contact Paper and
Board Materials and Their Products
ISSUED ON. JUNE 30, 2022
IMPLEMENTED ON. JUNE 30, 2023
Issued by. National Health Commission of the People's Republic of China; State Administration for Market Regulation.
Table of Contents
Foreword... 3
1 Scope... 4
2 Terms and definitions... 4
3 Basic requirements... 4
4 Technical requirements... 4
5 Others... 7
Annex A Preparation of water extraction test solution... 8
Annex B Migration test pretreatment of filter paper for food contact... 10 Annex C Determination of 1,3-dichloro-2-propanol and 3-chloro-1,2-propanediol in water extract... 11
National Food Safety Standard - Food Contact Paper and
Board Materials and Their Products
1 Scope
This document is applicable to food contact paper and board materials and their products.
2 Terms and definitions
2.1 Food contact paper and board materials and their products
Under normal conditions of use, various paper and board materials and products that have been or are expected to come into contact with food or food additives (hereinafter referred to as food), or whose components may be transferred to food, including waxed paper, silicone oiled paper and pulp molded products.
2.2 Pulp molded products
Products that use pulp as the main raw material, according to the shape required by the product use, are made through shaping, molding, drying and other processes. 3 Basic requirements
Food contact paper and board materials and their products shall comply with the provisions of GB 4806.1.
4 Technical requirements
4.1 Requirements for raw materials
4.1.1 The raw materials used in food contact paper and board materials and their products shall not cause harm to human health. Fiber raw materials shall be mainly plant fibers. The synthetic fiber raw materials contained shall meet the requirements of the corresponding national food safety standards.
4.1.2 The use of additives in food contact paper and board materials and their products shall comply with the provisions of GB 9685 and relevant announcements. Annex A
Preparation of water extraction test solution
A.1 Principle
According to the intended use of food contact paper and board materials and their products, use cold or hot water at a certain temperature to extract the cut or shredded paper and board specimens. The obtained test solution is used for the determination of the target analyte.
A.2 Reagents
Water.
NOTE. The water shall meet the requirements of the target analyte detection method. A.3 Instruments and equipment
A.3.1 Balance. resolution is 0.01g.
A.3.2 Stoppered Erlenmeyer flask. 500mL.
A.3.3 Constant temperature water bath. accuracy is ?? 2???.
A.3.4 Filter device. equipped with G4 glass sand core funnel and 500mL filter bottle. A.4 Specimen preparation
Cut or shred the obtained paper and board samples into small pieces of about 1cm2.The specimen amount shall be at least the number of specimens required by the target analyte determination method ?? 10g. Wear clean gloves when preparing samples to avoid direct contact with the samples.
A.5 Extraction
A.5.1 Sample weighing
Weigh 10g of specimen (accurate to 0.01g). When the test result is expressed in mg/dm2, it is necessary to measure the area of the paper and board corresponding to the 10g of specimen taken. The sample weight can be increased as needed but shall not exceed 20g.
A.5.2 Hot water extraction
When the temperature of the product expected to contact food exceeds 40??C, place the specimen in a stoppered conical flask. Add 200mL of boiling water. Cover with the Annex C
Determination of 1,3-dichloro-2-propanol and 3-chloro-1,2-propanediol in water extract
C.1 Principle
The aqueous extracts of paper and board samples prepared in accordance with Annex A are purified by diatomaceous earth solid phase extraction cartridge. Use ethyl acetate for elution. The eluate is concentrated and derivatized with
heptafluorobutyrylimidazole. Use gas chromatography-mass spectrometry to detect. Use peak area internal standard method for quantification.
C.2 Reagents and materials
Unless otherwise stated, the reagents used are analytically pure; the water is grade one water specified in GB/T 6682.
C.2.1 Reagents
C.2.1.1 Hexane (C6H14). chromatographically pure.
C.2.1.2 Ethyl acetate (C4H8O2).
C.2.1.3 Sodium chloride (NaCl).
C.2.1.4 Anhydrous sodium sulfate (Na2SO4).
C. 2.1.5 Heptafluorobutyrylimidazole (C7H3F7N2O, CAS No.. 32477-35-3).
C.2.2 Reagent preparation
Sodium chloride solution (20%, mass fraction). Weigh 20g of sodium chloride. Add 80mL of water to make sodium chloride completely dissolved. Mix well.
C.2.3 Standard product
C.2.3.1 1,3-dichloro-2-propanol (C3H6Cl2O, CAS No.. 96-23-1, English abbreviation. 1,3-DCP). The purity is ???98%, or the reference material certified by the state and granted the certificate of reference material.
C.2.3.2 3-chloro-1,2-propanediol (C3H7ClO2, CAS No.. 96-24-2, English abbreviation. 3-MCPD). The purity is ???98%, or the reference material certified by the state and granted the certificate of reference material.
C.2.3.3 1,3-dichloro-2-propanol-D5 (C3HCl2OD5, CAS No.. 1173020-20-6, English abbreviation. 1,3-DCP-D5). The purity is ???98%, or the reference material certified by the state and granted the certificate of reference material.
C.2.3.4 3-chloro-1,2-propanediol-D5 (C3H2ClO2D5, CAS No.. 342611-01-2, English abbreviation. 3-MCPD-D5). The purity is ???98%, or the reference material certified by the state and granted the certificate of reference material.
C.2.4 Preparation of standard solution
C.2.4.1 Chloropropanol mixed standard stock solution (1000mg/L). Respectively weigh 50mg of 1,3-DCP (C.2.3.1) and 3-MCPD (C.2.3.2) standard products (accurate to 0.1mg). Use ethyl acetate to dissolve. Transfer to a 50mL volumetric flask. Use ethyl acetate to set volume to the scale. Seal and store at 0??????4???. Shelf life is 6 months. C.2.4.2 Chloropropanol mixed standard intermediate solution 1 (10mg/L). Accurately pipette 0.1mL of chloropropanol mixed standard stock solution (C.2.4.1) in a 10mL volumetric flask. Use ethyl acetate to set volume to the scale. Seal and store at 0?????? 4???. Shelf life is 3 months.
C.2.4.3 Chloropropanol mixed standard intermediate solution 2 (1.0mg/L). Pipette 1mL of chloropropanol mixed standard intermediate solution 1 (C.2.4.2) in a 10mL volumetric flask. Use ethyl acetate to set volume to the scale. Seal and store at 0?????? 4???. Shelf life is 3 months.
C.2.4.4 Chloropropanol mixed internal-standard standard stock solution (1000mg/L). Accurately and respectively pipette 5mg of 1,3-DCP-D5 (C.2.3.3) and 3-MCPD-D5 (C.2.3.4) standard products (accurate to 0.01mg). Use ethyl acetate to dissolve. Transfer to a 5mL volumetric flask. Use ethyl acetate to set volume to the scale. Seal and store at 0??????4???. Shelf life is 6 months.
C.2.4.5 Chloropropanol mixed internal-standard standard intermediate solution (10mg/L). Accurately pipette 0.1mL of chloropropanol mixed internal-standard standard stock solution (C.2.4.4) in a 10mL volumetric flask. Use ethyl acetate to set volume to the scale. Seal and store at 0??????4???. Shelf life is 3 months.
C.2.4.6 Standard working solution. Take five 30mL test tubes. Respectively add 5.00mL of water. Accurately add 0.05mL of chloropropanol mixed standard intermediate solution 2 (C.2.4.3) as well as 0.01mL, 0.025mL, 0.05mL, 0.1mL of chloropropanol mixed standard intermediate solution 1 (C.2.4.2) in the test tubes. Obtain standard working solutions of which the chloropropanol concentration is 10.0??g/L, 20.0??g/L, 50.0??g/L, 100??g/L, 200??g/L, respectively. Prepare the standard working solution when it is needed. Take all out and pretreat them according to C.4.1. C.3 Instruments and equipment
C.3.1 Gas chromatography-mass spectrometer with EI source.
C.3.2 Analytical balance. Resolution is 0.0001g and 0.00001g.
C.3.3 Micro syringes. 0.1mL, 1mL and 5mL.
C.3.4 Vortex mixer.
C.3.5 Nitrogen concentrator.
C.3.6 Nylon microporous membrane. Pore size is 0.22??m.
C.3.7 Diatomite solid phase extraction cartridge. Filler mass is 5g. Column capacity is 5mL.
C.3.8 Incubator or another thermostatic heater.
C.4 Analysis steps
C.4.1 Specimen pretreatment
C.4.1.1 Specimen purification
Accurately pipette 5.00mL of water extract prepared according to Annex A into a test tube. Accurately add 0.05mL of chloropropanol mixed internal-standard standard intermediate solution (C.2.4.5). Then add 1g of sodium chloride. Dissolve completely. Use diatomaceous earth solid phase extraction cartridge. Equilibrate for 10min. Elute with 18mL of ethyl acetate. Collect the eluate in a test tube for processing. C.4.1.2 Eluent treatment
Add 4g of anhydrous sodium sulfate to a test tube. Place still for 10min. Use a funnel to filter into another test tube. Concentrate to near dryness (about 0.5mL; do not concentrate to complete dryness) in a 45??C water bath with nitrogen blowing. Then add 2mL of n-hexane to dissolve. Transfer to a 10mL colorimetric tube for derivatization. C.4.1.3 Derivatization
Quickly add 0.04mL of heptafluorobutyrylimidazole to the solution. Immediately cover with the glass stopper. Vortex for 30s. Incubate at 70??C for 30min. Take out and cool to room temperature. Add 2mL of sodium chloride solution. Vortex for 1min. Set aside to separate the aqueous phase and the n-hexane phase. Separate the n-hexane layer. Add about 0.3g of anhydrous sodium sulfate for drying. Use 0.22??m nylon filter to filter for testing.
C.4.2 Preparation of blank specimen
Without adding the sample, conduct water extraction test according to Annex A. Pretreat it according to C.4.1.
C.4.3 Determination
C.4.3.1 Gas chromatography-mass spectrometry reference conditions

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