GB 31604.39-2016 Translated English of Chinese Standard. GB31604.39-2016: National Food Safety Standard - Food Contact Materials and Articles - Determination of Polychlorobiphenyls (PCBs) in Food Contact Paperhttps://www.chinesestandard.net, 11.02.2018 - 16 Seiten This Standard specifies using the gas chromatography and gas chromatography-mass spectrometry to determine the polychlorobiphenyls in food contact paper. This Standard first method is gas chromatography, the second method is gas chromatography-mass spectrometry; both of which are applicable to determine 8 polychlorobiphenyls in the various food contact papers. |
Inhalt
| 3 | |
Scope | 4 |
Instruments and Equipment | 6 |
Expression of Analytical Results | 8 |
Principle | 9 |
Instrument and Equipment | 10 |
Expression of Analytical Results | 12 |
Appendix A Relevant Information on 8 PCBs and Internal Standard Substance | 13 |
Appendix B Gas Chromatogram of 8 PCBs and Internal Standard Substance Standard Solution | 14 |
Häufige Begriffe und Wortgruppen
15mL centrifugate tube 2g accurate 40°C water bath 5’-hexachlorobiphenyl PCB 138 6,6’-decachlorobiphenyl accelerated solvent extractor accurate to 0.01g Acetonitrile arithmetic mean centrifugate for 5min Characteristic Ions chromatographic pure composite food contact concentrated sulfuric acid concentration of 200mg/L diatomaceous earth electron capture detector extracted by accelerated extracting solution Food Contact Materials food contact paper Gas Chromatography gas chromatography-mass spectrometry internal standard substance maintain for 5min mix evenly Mixed standard series monolayer food contact n-hexane to prepare N-hexane-dichloromethane mixed solution paper are extracted PCBs and internal perform vortex shaking pipette appropriate amount Pipette supernatant reagents refer to Table Relevant Information Rotary evaporator seal and store shelf solution 1.00mg/L solution can refer solution with concentration specimen solution speed of 5000r/min standard series solution standard stock solution standard substance standard standard working solution store at 18°C substance can refer Substance Standard Solution substance working solution Table A.1 Take about 2g tetrachlorobiphenyl trichlorobiphenyl Water bath oscillation