基于离子交换纤维重金属的富集和选择性吸附

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1、万方数据ABSTRACTInthiswork，thequaternaryammoniumfibers(PP-g-DMAEMA-Br)whichcouldremoveCr(VI)ionsrapidlywerepreparedbyradiation—inducedgraftingof2-(dimethylamino)ethylmethacrylate(DMAEMA)ontopolypropylene(PP)fibers伊P—g—DMAEMA)andmodifying、Ⅳim1-bromoalkanes。Anovelcontinuouspreconcentration／separati

2、onanddeterminationsystembasedonafiber-packedmicrocolumnWaSdevelopedforspeciationanalysisofCROCI)inaqueoussolutionsamplespriortodeterminationbyIⅣ-visspectrophotometry．Allvariablesinvolvedinthedevelopmentofthepreconcentration／separationmethodincluding，pH，eluenttype，sampleandeluentflowrates，inte

3、rferingeffects，werestudiedinordertoachievethebestanalyticalperformance．Undertheoptimizedconditions，Undertheoptimizedconditions，thepreconcentrationprocess(preliminaryenrichmentWas100times)anddeterminationbyUV-visspectrophotometrycouldbecompletedwithin15min，andtherecoveryofCr(VI)was98．06-101．26

4、％．Thelimitofdetection(LOD)forCr(VI)WaS0．2¨g凡．ThesimplemethodaSsociatedwithportableinstrumentcartbeappliedtothelivedeterminationofCr(VI)indrinkingwatersampleswithfaStspeedandgoodsensitivityandreusability,especiallyinremoteareas．Similarly,thePP．-g—DMAEMA—BrwasalsousedasanadsorptionaSsociatedwit

5、hatomicfluorescencespectrophotometryforpreconcentrationanddetermineoftraceAs(V)．Thesampleflowrates，pHandeluenttypewereinvestigatedinordertoobtainoptimizedconditionsKeywords：PP-g—DMAEMA—Br；Cr(VI)；As(V)；fiber-packedmicrocolumn；preconcentration；UV—visspectrophotometry；Atomicfluorescencespectroph

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