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1、---------------------------------------------------------------范文最新推薦------------------------------------------------------烯草酮在馬鈴薯和土壤上分布研究摘要：本實(shí)驗(yàn)采用三級四級桿液質(zhì)聯(lián)用儀，建立并優(yōu)化了馬鈴薯和土壤中烯草酮的殘留分析的方法。經(jīng)優(yōu)化后的方法為:在錐形瓶中稱取樣品5.00g，加入20.0mL超純水，2.0mL乙酸鉛，加入20.0mL乙腈，在搖床上搖晃2h后抽濾，鹽析
2、，靜置分層。取上層清液1mL，用30mgC18分散固相萃取填料進(jìn)行凈化，凈化后的溶液用0.22μm微孔濾膜過濾，裝入進(jìn)樣小瓶上機(jī)。流動(dòng)相為乙腈-水-甲酸(體積比60∶40∶0.1)，流速0.3mL/min；柱溫為35℃；進(jìn)樣量4μL。離子對360.1/164.1為定量離子，對烯草酮?dú)埩暨M(jìn)行定量分析。實(shí)驗(yàn)進(jìn)行了三個(gè)添加水平測試，分別為0.05mg•kg-1、0.1mg•kg-1和0.2mg•kg-1，得到的平均回收率為85.3%~86.8%，相對平均偏差（RS
3、D）小于5%。烯草酮在馬鈴薯上的最大殘留限量為0.1mg•kg-1，該方法的檢出限為0.010mg•kg-1，定量限為0.02017/17---------------------------------------------------------------范文最新推薦------------------------------------------------------mg•kg-1，該方法的準(zhǔn)確性、精確性以及靈敏度符合農(nóng)藥殘留分析測定的要求。8930關(guān)鍵字
4、：烯草酮，殘留分析，液質(zhì)聯(lián)用，馬鈴薯DistributionofClethodiminpotatoandsoilAbstract:Inthisstudy,weusethethreequadrupoleLC-MSinstrument,theanalysismethodofclethodimresiduesinpotatoandsoilisestablishedandoptimized.Themethodafteroptimizationis:weigh5.00gsampleintheconicalfl
5、ask,add20.0mLultrapurewater,2.0mLleadacetate,20.0mLacetonitrile,shaking2hinashaker,filtration,saltingrested,stratification.Takethesupernatantfluid1mL,With30mgC18dispersivesolid-phaseextractionpackingforpurificatio,afterpurification,thesolutionwith0.22u
6、mmicroporousmembranefilter,loadthesamplevialandReadytomachine.Mobilephaseisacetonitrile-water-formicacid(volumeratio17/17---------------------------------------------------------------范文最新推薦------------------------------------------------------60:40:0.
7、1),theflowrateof0.3mL/min;Columntemperatureof35℃;Samplequantity4uL.Ionon360.1/164.1isquantitativeion,ionpair360.1/164.1asaquantitativeion,analysisresiduesofclethodim.Experimentwascarriedoutthreeaddleveltest,respectivelyare0.05mg•kg-1,0.1mg•kg
8、-1,0.2mg•kg-1.Theaveragerecoverywas85.3%~85.3%,averagerelativedeviation(RSD)islessthan5%.Themethoddetectionlimitis0.010mg•kg-1,quantitativelimitis0.020mg•kg-1,accuracy,precisionandsensitivityofthismethodmeetstherequiremen
