第48卷第2期2023年2月环境科学与管理ENVIRONMENTALSCIENCEANDMANAGEMENTVol.48No.2Feb.2023收稿日期:2023-02-09作者简介:吴梦青(1991-),女,学士,工程师,研究方向:环境监测与分析。文章编号:1674-6139(2023)02-0139-05(1+1)王水消解体系在土壤金属测定中的方法研究吴梦青1,周熙1,杜正1,郭爱娣2(1.杭州市余杭生态环境监测站,浙江杭州311199;2.杭州市临平生态环境监测站,浙江杭州311199)摘要:采用(1+1)王水消解体系,对土壤标准物质进行预处理,再通过原子吸收分光光度法测定土壤中的铜、锌、镍、铅、镉5种金属元素。为寻求对实验人员危害更低的消解方法,分别调整王水用量、消解温度、消解时间,测得溶出率,检验结果准确度。研究结果表明,优化后用5mL(1+1)王水于120℃温度下消解2h,溶出率提升10%~15%。计算方法精密度,结果符合要求,具有重复性。该土壤预处理方法有利于减少用酸量、省略赶酸步骤、减少环境污染、操作简单、成本低等优势,适用于测定以上金属元素。关键词:(1+1)王水消解体系;金属元素;土壤预处理;王水用量;消解温度中图分类号:X833文献标志码:BDeterminationofMetalsinSoilby(1+1)AquaRegiaDigestionSystemWuMengqing1,ZhouXi1,DuZheng1,GuoAidi2(1.YuhangEcologicalEnvironmentMonitoringStation,Hangzhou311199,China;2.LinpingEcologicalEnvironmentMonitoringStation,Hangzhou311199,China)Abstract:The(1+1)aquaregiadigestionsystemwasusedtopretreatthesoilreferencematerials,andthenthefivemetalel-ementsofcopper,zinc,nickel,leadandcadmiuminthesoilweredeterminedbyatomicabsorptionspectrophotometry.Inordertofindalessharmfuldigestionmethodforlaboratorypersonnel,theamountofaquaregia,digestiontemperatureanddigestiontimewereadjusted,bymeasuringthedissolutionrateandtesttheaccuracyoftheresults.Theresultsshowedthatthedissolutionratecanbeincreasedby10%~15%aftertheoptimizationbyusing5mL(1+1)aquaregiatodigestat120℃for2h.Precisionofthemethodmettherequirementsandhadrepeatability.Thissoilpretreatmentmethodhadtheadvantagesofreducingacidconsumption,omittingaciddrivingsteps,reducingenvironmentalpollution,simpleoperationandlowcost.Itissuitableforthedeterminationoftheabovemetalelements.Keywords:(1+1)aquaregiadigestionsys...