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时间:2020-05-15
《活性炭在富集水中痕量重金属中的研究及应用.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第34卷第2期分析测试学报Vo1.34No.22015年2月FENXICESHIXUEBAO(JournalofInstrumentalAnalysis)221—226doi:10.3969/j.issn.1004—4957.2015.02.017活性炭在富集水中痕量重金属中的研究及应用周巧丽,雷永乾,郭鹏然,潘佳钏,王冠华(中国广州分析测试中心广东省测试技术公共实验室,广东广州510070)摘要:采用微波等离子体原子发射光谱仪(MP—AES)研究了活性炭对水中微量重金属的富集性能,实现了一种简单有效,能
2、够同时富集痕量zn(H),Cd(H),V(Ⅲ),Co(H),Ni(II),Pb(Ⅱ),Mn(I1)和cr(Ⅲ)8种重金属的方法。实验优化了预富集条件,包括pH值、填料量、样品速率、样品体积和洗脱条件,同时考察了常见干扰离子的影响,结果显示常见干扰离子对分析物的回收率无影响。在最优条件下,该方法对zn(II),Cd(I),V(Ⅲ),Co(I),Ni(Ⅱ),Pb(H),Mn(II)和Cr(Ⅲ)的检出限分别为0.45,0.35,0.25,0.06,0.40,0.25,0.20,0.20Ixg·L~。该方法对10
3、g·L分析物测定的相对标准偏差(RSD,n=8)均小于5.0%。V(m),Pb(Ⅱ)和cr(In)的最大富集因子为50;其他5种金属离子的最大富集因子不小于300。利用标准物质对该方法进行验证,并对实际环境水样进行测定,结果令人满意。关键词:活性炭;预富集;微波等离子体原子发射光谱仪(MP—AES);重金属中图分类号:0657.3;TS207.51文献标识码:A文章编号:1004—4957(2015)02~0221—06EnrichmentofTraceHeavyMetalsinWaterbyActiva
4、tedCarbonAbsorptionZHOUQiao—li,LEIYong-qian,GUOPeng—ran,PANJia—chuan,WANGGuan·hua(GuangdongProvincialPublicLaboratoryofAnalysisTestingTechnology,ChinaNationalAnalyticalCenter(Guangzhou),Guangzhou510070,China)Abstract:Amethodthatutilizesactivatedcarbonasas
5、olid—phaseextractionwasdevelopedforthesimultaneouspreconcentrationofeighttraceheavymetals,includingtraceZn(1),Cd(1),V(111),Co(Ⅱ),Ni(1I),Pb(Ⅱ),Mn(Ⅱ)andCr(Ⅲ),priortothemeasurementbymicro.waveplasmatorch—atomicemissionspectrometryfMP—AES).Influencesofsomeana
6、lyticalparam—etersincludingpHvalueofsample,amountofadsorbent,flowrateandvolumeofsample,elutionconditionwereoptimized.Moreover,effectsofforeignionsonrecoveriesofthedeterminedelementswerestudied.Theexperimentshowedthatforeignionsdidnotinfluencerecoveriesoft
7、hedeterminedelements.Undertheoptimizedconditions,thedetectionlimitsforZn(1),Cd(Ⅱ),V(1lI),Co(Ⅱ),Ni(II),Pb(H),Mn(Ⅱ)andCr(111)were0.45,0.35,0.25,0.06,0.40,0.25,0.20,0.20g·L~,respectively.Therelativestandarddeviations(=8)forthedeterminedele—ments(10g·L)werelo
8、werthan5%.Thelargestpreconcentrationfactorswereabout50forV(1II),Pb(1)andCr(11I),andnotlessthan300fortherestofheavymetals.Themethodwasvalidatedusingacertifiedreferencematerial,andwasalsoappliedsuccessfullyinthedeterm
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