進(jìn)出口食品中腈菌唑殘留量檢測方法 氣相色譜質(zhì)譜法

進(jìn)出口食品中腈菌唑殘留量檢測方法氣相色譜-質(zhì)譜法根據(jù)樣液中腈菌唑含量的情況，選定濃度相近的標(biāo)準(zhǔn)工作溶液。標(biāo)準(zhǔn)工作溶液和樣液應(yīng)值應(yīng)在儀器檢測的線性范圍內(nèi)。標(biāo)準(zhǔn)工作溶液和樣液(6.2)等體積穿插進(jìn)樣測定。在上述色譜條件下，情菌唑的保留時(shí)間約為11.8min.對標(biāo)準(zhǔn)溶液及樣液均按上述規(guī)定的條件進(jìn)行檢查，如果樣液與標(biāo)準(zhǔn)溶液在相同的保留時(shí)間有峰出豐度比與標(biāo)準(zhǔn)品相關(guān)離子的相對豐度一致，A——樣液中腈菌唑的峰面積(或峰高);A.——標(biāo)準(zhǔn)工作液中腈菌唑定量離子色譜峰的峰面積(或峰高);采用本方法對樣品進(jìn)行添加回收實(shí)驗(yàn)，添加濃度為0.005mg/kg,0.010mg/kg和0.020mg/kg.添加回收率見表2。表2(續(xù))添加濃度/(mg/kg)梨胡蘿卜(資料性附錄)AnnexAofthisstandardisaninformThisstandardisproposedbyandisunderthechargeofCertificationtionofthePeople'sRepThisstandardisdraftedbyBeijinginspectionandQuarantineBureauThisstandardismainlycantributedbyWangJinhua,XuChaoyZhuXiaoyu,LiShiyu,ShangDejun,HaThisstandardisaprofessionalsfoodstuffsforimportande3.1Acetonitrile;HPL3.9Sodiumchloride(NaCl3.10Anhydroussodiumsulphate:burnat650Cfor43.11Elutingsolution:n-hexiane+acetone(4+1.V/V).3.12Ethylacetate-Cyclohexane:1+1,V3.13Standard:Myclobutanil.CASNo.;88671-B9-0,molecularformula;CuH,CIN.,pur3.14Standardstoresolution;weighanadequateamountdissolveinTolueneandprepar3.15StandardworkingsalutionBccordingtotheconcentrationrequiredtionispreparedfromthestocksolutionwithtoluen3.16Envi-Carbcartridge:6mL.5004Apparatusandequipm4.3Ultrasonicwaterbapermittedtolerance(El-GC-MCalculationoftheresiduecontentofmyclobutanilinthetestsamplesisdonebyChemStations (1)Table2—Recoveryrange(%)ofmyclobutanilindiffera