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1、苏州科技学院硕士学位论文摘要下，Co(II)的LOD为0.03ug/L，线性范围为0.05~4.00μg/L，对浓度0.50μg/L，2.00μg/LCo(II)标准液分别测定10次的RSD为2.3%和1.7%。本方法应用于自来水、河水和湖水中痕量铅的分析，加标回收率在94.34～107.17%之间，测定结果令人满意。关键词：预处理技术，连续光源原子吸收光谱法，分散液相微萃取，APDC，痕量金属II万方数据苏州科技学院硕士学位论文摘要AbstractAnewmethodofdispersiveliquid–liquidmicroextractionpriorcontinuums
2、ource-graphitefurnaceatomicabsorptionspectrometrywithmanyadvantages,suchashighefficiency,highrecovery,lowconsumption,lowpollutionwasusedtodeterminetracechromium(VI),lead(II),cobalt(II)inenvironmentalwatersamples.Dispersiveliqμid–liqμidmicroextractionfactorswereoptimized,anditisappliedtothede
3、terminationoftheactualwatersamplesunderoptimaltestconditionsThemaincontentofthearticleincludesthefollowingsections:1.thesourcesandhazardsofheavymetalelementsinwater,andtheadvancesonmonitoringofmetalsusingdifferentextractionmethodsofsamplepretreatmentarebrieflydescribed.Inparticular,DLLME,asa
4、newmicro-extractiontechnologyisemphasized,anditsroletheory,impactfactorsandapplicationintheanalysisoftraceelementsaredetaileddescribed.2.Ashingtemperatureandatomizationtemperatureofcontinuumsource-graphitefurnaceatomicabsorptionspectrometry(CS-GFASS)wereoptimizedthroughstandardsolutionofchro
5、mium(VI)andgotthebestconditions:1300℃and2400℃.Dispersiveliquid-liquidmicroextractionseparateandenrichtracechromium(VI)complexeswithammoniumpyrrolidinedithiocarbamate(APDC)andthencanbeextractedintocarbontetrachloridedropletsformedbyinjectingthebinarysolutionofcarbontetrachloride(extractionsol
6、vent)andEthanol(dispersivesolvent)intothesamplesolution.FactorsofDLLMEhavebeendiscussedandtheresultsisasfollows:pHis2.0,temperatureis35℃andthevolumeofchelating,extractionagentanddispersantsis0.12g/L,30μLand0.5mLrespectively,extractiontimeis5minutes.Thedetectionlimitofchromium(VI)inwatersampl
7、esis0.005μg/Landthelinearrangeis0.05~2.00μg/L.whentheconcentrationsof0.20μg/L,1.00μg/LCr(VI)standardsolutionweremeasured10times，therelativestandarddeviationis0.3%and2.4%.Inordertosimulatetheactualwatersamples,availableinterferingionswereaddedtostan
