微波消解-电感耦合等离子体质谱法同时测定垃圾渗滤液中8种生物毒性元素

化学分析计量CHEMICALANALYSISANDMETERAGE第28卷，第6期2019年11月Vol.28，No.6Nov201935doi：10.3969／j.issn.1008–6145.2019.06.008微波消解–电感耦合等离子体质谱法同时测定垃圾渗滤液中8种生物毒性元素燕鸿鹏（重庆三峰环境集团股份有限公司，重庆400084）摘要建立了微波消解–电感耦合等离子体质谱法测定垃圾渗滤液中铜、锌、镍、铬、镉、砷、铅、汞等8种生物毒性元素的含量。以5mL硝酸及1mL过氧化氢为消解剂，对垃圾渗滤液样品进行微波消解处理，以45Sc，89Y，115In，209Bi为内标元素消除非质谱干扰，以氦气为碰撞反应气消除质谱干扰，用电感耦合等离子体质谱仪进行定量分析。在1~100μg／L的质量浓度范围内标准工作曲线线性关系良好，相关系数均大于0.999，方法检出限为0.02～0.13μg／L，测定结果的相对标准偏差为1.02%～3.78%(n=6)，加标回收率为88.0%～98.8%。该方法检出限低、精密度高，能够满足垃圾渗滤液中上述8种元素的日常分析测定。关键词微波消解；电感耦合等离子体质谱；垃圾渗滤液；铜；锌；镍；铬；镉；砷；铅；汞中图分类号：O657.6文献标识码：A文章编号：1008–6145(2019)06–0035–04Simultaneousdeterminationof8kindsofbiotoxicityelementsinlandfillleachatebyinductivelycoupledplasmamassspectrometrywithmicrowavedigestionYANHongpeng（ChongqingSanfengEnvironmentGroupCo.Ltd.,Chongqing400084,China）AbstractAmethodwasestablishedtomeasure8kindsofbiotoxicityelementssuchascopper,zinc,nickel,chro-mium,cadmium,arsenic,leadandmercuryinlandfillleachatebyinductivelycoupledplasmamassspectrometrywithmi-crowavedigestionforsamplepreparation.With5mLnitricacidand1mLhydrogenperoxideasdigestagent,microwavedigestionoflandfillleachatesamplespretreatment,45Sc,89Y,115Inand209Biwereusedastheinternalstandardelementtoeliminatenon-spectroscopicinterferenceandheliumwasusedascollisiongastoeliminatemassspectroscopicinterfer-ence.Inductivelycoupledplasmamassspectrometrywasusedtoquantitativelyanalyzethecontentsof8kindsofelementsinthedigestionliquid.Theworkingcurvesshowedagoodlinearrelationshipwithinacertainmassconcentrationrangeof1–100μg／L.Thecorrelationcoefficientswereallmorethan0.999.Thedetectionlimitswere0.02–0.13μg／L.Therela-tivestandarddeviationswere1.02%–3.78%(n=6),andtherecoveryrateswere88.0%–98.8%.Withlowdetectionlimitandhighprecise,thismethodcanmeettherequirementsofdailyanalysisanddeterminationoftheabove8elementsinlandfillleachate.Keywordsmicrowavedigestion;inductivelycoupledplasmamassspectrometry;landfillleachate;copper;zinc;nickel;chromium;cadmium;arsenic;lead;mercury基金项目生活垃圾焚烧技术国家地方联合工程研究中心创新能力建设项目(2015–500104–77