环境污染与治理-88-固相萃取-高效液相色谱-串联质谱法同时测定饮用水中的氨基酸污染物赵妮娜(四川省广元生态环境监测中心站,四川广元628017)摘要:氨基酸是水中重要的含氮有机物,已有研究表明,水中含氮消毒副产物的前体,其中一些具有细胞毒性和致癌性。因此,相关人员开发了一种固相萃取-超高效液相色谱-串联质谱法(UPLC-MS/MS)测定15种游离氨基酸(FAAs),并成功应用于饮用水源水样品的测试。研究结果表明:强阳离子交换固定固相萃取柱的萃取性能优于反相固相萃取柱,提取前确定水的最佳pH值为2.8,所以建议用SPE提取样品以消除基质效应。所开发的方法显示出良好的线性(R2>0.991),检测限低(LODs,0.01~0.27nmol/L),在饮用水源水中的回收率为69.8%~117.9%。关键词:固相萃取;液相色谱;串联质谱法;氨基酸;污染物中图分类号:TS5文献标志码:ADOI:10.20025/j.cnki.CN10-1679.2023-18-29SimultaneousDeterminationofAminoAcidPollutantsinDrinkingWaterbySolidPhaseExtractionHighPerformanceLiquidChromatographyTandemMassSpectrometryZhaoNina(GuangyuanEcologicalEnvironmentMonitoringCenterStation,SichuanProvince,Guangyuan628017,China)Abstract:Aminoacidsareimportantnitrogen-containingorganiccompoundsinwater.Previousstudieshaveshownthattheyareprecursorsofnitrogen-containingdisinfectionby-productsinwater,someofwhichhavecytotoxicityandcarcinogenicity.Therefore,asolid-phaseextractionultrahighperformanceliquidchromatographytandemmassspectrometry(UPLC-MS/MS)methodforthedeterminationof15freeaminoacids(FAAs)wasdevelopedandsuccessfullyappliedtothetestingofdrinkingwatersamples.Theresearchresultsindicatethattheextractionperformanceofthestrongcationexchangefixedsolid-phaseextractioncolumnissuperiortothatofthereversephasesolid-phaseextractioncolumn,theoptimalwaterpHdeterminedbeforeextractionis2.8,therefore,itisrecommendedtoextractsamplesusingSPEtoeliminatematrixeffects,thedevelopedmethodexhibitsgoodlinearity(R2>0.991),lowdetectionlimits(LODs,0.01~0.27nmol/L),andarecoveryrateof69.8%~117.9%indrinkingwatersources.Keywords:solidphaseextraction;liquidchromatography;tandemmassspectrometry;aminoacids;pollutant引言氨基酸(AAs)是地表水中有...