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GB 2726-2016 PDF in English


GB 2726-2016 (GB2726-2016) PDF English
Standard IDContents [version]USDSTEP2[PDF] delivered inName of Chinese StandardStatus
GB 2726-2016English70 Add to Cart 0-9 seconds. Auto-delivery. Hygienic standard for cooked meat products Valid
GB 2726-2005English70 Add to Cart 0-9 seconds. Auto-delivery. Hygienic standard for cooked meat products Obsolete
GB 2726-1996English199 Add to Cart 2 days Hygienic standard for cooked meat Obsolete
GB 2726-1981EnglishRFQ ASK 3 days Hygienic standard for meats cooked in soy sauce Obsolete
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GB 2726-2016: PDF in English

GB 31604.29-2016 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA National Food Safety Standard - Food Contact Materials and Articles - Determination of Migration of Methyl Methacrylate 食品接触材料及制品 ISSUED ON. OCTOBER 19, 2016 IMPLEMENTED ON. APRIL 19, 2017 Issued by. National Health and Family Planning Commission of the People's Republic of China 3. No action is required - Full-copy of this standard will be automatically & immediately delivered to your EMAIL address in 0~60 minutes. Table of Contents Foreword ... 3  1 Scope ... 4  2 Principle... 4  3 Reagents and materials ... 4  4 Instruments and equipment ... 5  5 Analysis steps ... 6  6 Expression of analysis results ... 8  7 Precision... 8  8 Other ... 8  Annex A Methyl methacrylate (MMA) standard gas chromatography-mass spectrometry ion monitoring chart ... 9  Annex B Sunflower seed oil specifications ... 10  Foreword This Standard replaces SN/T 2894-2011 Food contact materials for export. Polymers. Determination of methyl methacrylate in food simulant chromatography-mass spectrometry. Compared with SN/T 2894-2011, the main changes in this Standard are as follows. - modified the standard’s name to “National Food Safety Standard - Food Contact Materials and Articles - Determination of Migration of Methyl Methacrylate”; - modified the preparation of food simulate test solution; - modified the expression of analysis results; - modified the detection limit and quantitation limit. National Food Safety Standard - Food Contact Materials and Articles - Determination of Migration of Methyl Methacrylate 1 Scope This Standard specifies the determination of gas chromatography - mass spectrometry of migration of methyl methacrylate in food contact materials and articles. This Standard is applicable to the determination of migration of methyl methacrylate in food contact materials and articles. 2 Principle Methyl methacrylate in water, acid, alcohol simulants are extracted with ethyl acetate. After the sunflower oil mimetic is extracted by anhydrous ethanol, the extract shall be detected by gas chromatography-mass spectrometry. Use external standard method to quantify. 3 Reagents and materials Unless otherwise stated, the reagents used in this method are of analytical grade and water is of grade one specified in GB/T 6682. 3.1 Reagents 3.1.1 Sodium chloride (NaCl). 3.1.2 Anhydrous sodium sulfate (Na2SO4). 3.1.3 Ethyl acetate (C4H8O2). chromatographic pure. 3.1.4 Anhydrous ethanol (C2H5OH). chromatographic pure. 3.1.5 Water-based, acidic, alcohol food simulant. the reagents used are in accordance with the provisions of GB 31604.1. 3.1.6 Sunflower seed oil. see Table B.1 in Annex B for specifications. 4.5 Volumetric flask. 50 mL, 100 mL, 1000 mL. 4.6 Organic filter. 0.45 μm. 4.7 Pipettes. 2 mL, 5 mL, 10 mL. 4.8 Plugged centrifuge tube. 10 mL. 4.9 Adjustable pipettes (1 μL ~ 20 μL, 20 μL ~ 100 μL, 100 μL ~ 5000 μL). 5 Analysis steps 5.1 Sample migration test In accordance with the requirements of GB 5009.156 and GB 31604.1, the sample shall be subjected to a migration test to obtain a food simulant test solution. If the food simulant test solution cannot be immediately used for the further test, the food simulant test solution shall be preserved at 0°C ~ 4°C refrigerator in the dark. It shall cool or recover the obtained food simulant test solution to room temperature before the further test is carried out. 5.2 Preparation of test solution 5.2.1 Preparation of water-based, acidic, alcohol simulant test solutions Pipet 2.0 mL of the water-based, acidic, alcohol simulants obtained from the migration test in 10 mL plugged centrifuge tube. Respectively add 0.5 g of sodium chloride and 2 mL of ethyl acetate into the centrifuge tube. After vortex extraction (1500 r/min) for 1.5 min, put it aside for 2 min. Remove the supernatant. Use anhydrous sodium sulfate to dry. Filter it through a 0.45 μm filter for gas chromatography-mass spectrometry. 5.2.2 Preparation of sunflower seed oil simulant test solution Pipet 2 g (to the nearest 0.1 mg) of sunflower seed oil food simulant obtained from the migration test into the 10 mL plugged centrifuge tube. Add 2 mL of ethyl acetate into the centrifuge tube. After vortex extraction (1500 r/min) for 1 min, put it aside for 2 min. Centrifuge in the high-speed centrifugation (4000 r/min) for 5 min. Immediately remove the supernatant. Filter it through a 0.45 μm filter for gas chromatography-mass spectrometry. 5.3 Preparation of blank test solution Process the food simulant not contact with food contact material according to the steps of 5.2.1 and 5.2.2. The blank solution and food simulant test solution shall be sequentially injected. The blank area is deducted so as to obtain the peak area of methyl methacrylate. 6 Expression of analysis results Obtain the concentration of methyl methacrylate in the sample solution from the standard curve. Calculate the amount of migration according to GB 5009.156. Obtain the amount of methyl methacrylate in the food simulant and products. The result is retained to two digits after the decimal point. 7 Precision The absolute difference between the two independent determinations obtained under repeatability shall not exceed 10% of the arithmetic mean. 8 Other The detection limit of methyl methacrylate in water-based, acidic, and alcohol simulants is 0.2 mg/L. The detection limit of methyl methacrylate in sunflower seed oil simulant is 0.3 mg/kg. The quantification limit of methyl methacrylate in water-based, acidic, and alcohol simulants is 0.5 mg/L. The quantification limit of methyl methacrylate in sunflower seed oil simulant is 0.7 mg/kg. ......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.