GB 5009.26-2016 Translated English of Chinese Standard. GB5009.26-2016: National Food Safety Standard - Determination of N-nitrosamine Compounds in Food
https://www.chinesestandard.net, 12 jul 2019 - 15 páginas
This Standard specifies determination method of N-dimethylnitrosamine in food. This Standard is applicable to determination of N-dimethylnitrosamine in meat and meat products, aquatic animals and their products.
Expression of analysis results
Annex A Steam distillation device diagram
Annex B Gas chromatogram
Gas chromatography thermal energy analyzer spectrogram
150mL of dichloromethane 1mg/mL solution 20g of sodium 30mL of sulfuric 40°C water batch 500mL flat bottom Accurately weigh 200g add into 20g Anhydrous sodium sulfate area of N-dimethylnitrosamine arithmetic mean capillary column column chromatographic column concentrate to 5mL~10mL content in sample Deflate if necessary dichloromethane to extract dichloromethane to prepare distillation device diagram Distillation of water ethanol Expression of analysis Extraction Distillation Figure A.1 flat bottom flask full-glass device Full-glass steam distillation Gas chromatographic conditions gas chromatography mass spectrometry methylene chloride methylene chloride level micrograms milliliters mix after cooling move methylene chloride N-dimethylnitrosamine standard N-nitrosamine compound N-nitrosamine standard C2H6N2O N-nitrosamine standard solution Nitrogen blower pipette Pointed glass tube positive response Pyrolysis remain three significant resolutions are 0.01g sample mass separating funnel sodium chloride solution into GC-TEA solution to 500mL speed rate standard curve standard series standard use solution steam distillation device Sulfuric acid Thermal energy analyzer volume to 1.0mL water bath