SN/T 2431-2010 English PDF
Basic dataStandard ID: SN/T 2431-2010 (SN/T2431-2010)Description (Translated English): Determination of halfenprox residues in food for import and export Sector / Industry: Commodity Inspection Standard (Recommended) Classification of Chinese Standard: X04 Classification of International Standard: 67.050 Word Count Estimation: 23,231 Date of Issue: 2010-01-10 Date of Implementation: 2010-07-16 Regulation (derived from): National Quality Inspection (2010) No. 13 Issuing agency(ies): General Administration of Customs Summary: This standard specifies the import and export food benzyl ether mite residues detected by gas chromatography and gas chromatography mass spectrometry confirmatory method. This standard applies to asparagus, potatoes, onions, pears, peaches, corn, buckwheat, tea, vinegar, honey, walnuts, rabbit, chicken, shrimp, chicken mite benzyl ether residue testing. SN/T 2431-2010: Determination of halfenprox residues in food for import and export---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Determination of halfenprox residues in food for import and export Exit inspection and quarantine industry standard book People's Republic of China Detection mite ether residues in imported and exported food benzyl Issued on. 2010-01-10 2010-07-16 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released ForewordAppendix A of this standard is an informative annex. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. Shanxi People's Republic of China Exit Inspection and Quarantine. The main drafters of this standard. Xue Ping, Du Lijun, Yuan Li, Wu Haijun, Zhang Xiaofeng, Pan Yali. Detection mite ether residues in imported and exported food benzyl1 ScopeThis standard specifies the gas chromatography and gas chromatography imported and exported food mite benzyl ether Residues - Mass validated method. This standard applies to asparagus, potatoes, onions, pears, peaches, corn, buckwheat, tea, vinegar, honey, walnuts, rabbit, chicken, shrimp, chicken in Benzyl ethers mite residues detected.2 Method summaryVinegar and honey dissolved in water and diluted solid phase extraction; onions and tea with ethyl acetate - cyclohexane extraction solid phase extraction; animal Derived foods and foods high oil content extracted with acetonitrile, ethyl acetate and other foods - cyclohexane mixed extraction solvent extracts by gel color Spectrometer (GPC) purification for gas chromatography with electron capture detector, external standard, positive samples by gas chromatography - mass spectrometry Confirmed.3 Reagents and materialsUnless otherwise specified, the reagents were of analytical grade, double distilled water. 3.1 ethyl acetate. chromatography. 3.2 Cyclohexane. chromatography. 3.3 acetonitrile. chromatography. 3.4 hexane. chromatographically pure. 3.5 acetone. chromatography. 3.6 anhydrous sodium. 650 ℃ burning 4h, stored in a sealed container in the back. 3.7 sodium chloride. 3.8 ethyl acetate - cyclohexane solvent mixture (1 + 1, volume ratio). amount of 500mL ethyl acetate and 500mL of cyclohexane, and mix. 3.9 hexane - acetone mixed solvent (9 + 1, volume ratio). amount of 90mL and 10mL of n-hexane, acetone, and mix. 3.10 cyclohexane - ethyl acetate solvent mixture (6 + 1, by volume). the amount of 10mL ethyl acetate and 60mL of cyclohexane, and mix. 3.11 Benzyl Ether mites standard substance. (halfenprox; CAS Number. 111872-58-3; C24H23BrF2O3; molecular weight. 477.34) A purity of not less than 99%. 3.12 Standard stock solution (100mg/L). accurately weighed amount of reference material, dissolved in ethyl acetate to prepare a concentration of 100mg/L of Standard stock solution, the solution was stored at 0 ℃ ~ 4 ℃ refrigerator. 3.13 standard working solution. diluted with ethyl acetate needed to apply the standard working solution concentration. Standard working solution should now use the existing. 3.14 graphitized carbon black and PSA mixing column. 1mL, 50mg graphitized carbon black + 50mgPSA, with 3mL cyclohexane - ethyl acetate mixture Co-solvent (3.10) activation. 3.15 HLB solid phase extraction column. 3mL, 60mg, or rather who, washed with 2mL hexane - acetone mixed solution (3.9), 2mL propionate Ketones, 5mL distilled water pre-rinse. The organic phase was 3.16 membrane. 0.45μm.4 instruments and equipment4.1 Gas chromatograph equipped with electron capture detector. ...... |
