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时间:2018-09-18
《液相色谱-串联质谱法快速筛查测定浓缩果蔬汁中的156种农药残留》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、2009年3月色谱V01.27No.2March2009ChineseJournalofChromatography127~137156一电喷雾串联质谱(LC—ESI—MS/MS)测定方法摘要:建立了浓缩果蔬汁中种农药多残留的液相色谱。样品用1%WatersSep—PakVac固相一3:1)洗脱醋酸乙腈溶液萃取,经萃取柱净化,乙腈甲苯(体积比为,旋转蒸发浓缩,用乙腈一3:2AgilentZORBAXSB—C18色谱柱分离水(体积比为)溶解,以,以电喷雾电离串联质谱在正离子多反应监测(MRM)模式下进行测定。对156种农药在5种浓
2、缩果蔬汁(橙汁、苹果汁、葡萄汁、白菜汁、胡萝卜汁)中两个添~~19加水平下的回收率进行了测定7.2%122.7%0.9%.8%。方法的检出,回收率范围为5,相对标准偏差范围为~kg和0~限(∥Ⅳ=3)和定量限(∥Ⅳ=10)范围分别为0.1056.77~g/.33189.23~g/kg。该方法样品前处理简单、快速、分析时间短,灵敏度、准确度和精密度均符合农药多残留检测技术的要求,适用于苹果汁、橙汁、葡萄汁、白菜汁、胡萝卜汁等浓缩果蔬汁中156种农药多残留的快速筛查测定。关键词:液相色谱一串联质谱;QuEChERS方法;农药多残留;
3、浓缩果蔬汁中图分类号:0658文献标识码:A文章编号:1000—8713(2009)02—0127—11栏目类别:研究论文Abstract:Amultiresidueanalyticalmethodwasdevelopedforthedeterminationof156pesti—cidesinconcentratedfruitandvegetablejuicesusingliquidchromatographycoupledwithelec—LC—ESI—MS/MS)trosprayionizationtandemmasssp
4、ectrometry(.Thepesticideresidueswereextractedfromthesamesbacetonitrilecontaininacetateacid-plyg1%.cleanedupbyaWatersSep-PakVaccartridgeelutedwith25mLacetonitrile—toluene3:1v/v)andconcentrated,(,witharotaevaorator—water:2v/v.Thesamplewasredissolvedintheacetonitrile3ry
5、p(,),thenanalyzedusingLC—MS/MSinmultiplereactionmonitoring(MRM)modeviapositiveelec—trosprayionizationwithanAgilentZORBAXSB—C18columnastheanalyticalcolumn.Themethodwasvalidatedattwofortificationlevelsinfivefruitandvegetablejuices,orange,aeraecabbaeandcarrotuices.Theva
6、lidationresultswereasfollowsTheoverallppl,gp,gj:recoverieswerefrom57一.2%tol22.7%withtherelativestandarddeviations(RSDs)of0.9%19.8%andthelimitsofdetectionS/N=3)andthelimitsofquantificationN=10)were,((S/0——.1056.77/kgand0.33189.23/kgresectivel.Theresultsdemonstratedtha
7、tthis~g~g,pymethodissimple.rapidandcharacterizedwithacceptablesensitivityandaccuracytomeettherequirementsofthemultiplepesticideresidueanalysis.Thismethodisapplicabletoconfirm156pesticideresiduesintheabovefivejuices.Keywords:liquidchromatography—tandemmassspectrometry
8、(LC—MS/MS);QuEChERSmethod;multiplepesticideresidues;concentratedfruitandvegetablejuices{—通讯联系人:庞国芳,中国工程院院士,从事农兽药残留检测技术研究.Email:qhdc
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