Abstract:
THEEXTRACTIONBEHAVIOUROFAs(Ⅲ)ANDAs(Ⅴ)INAPDC┐CCl4SYSTEMYangRuiyingZhuXuping(InstituteofHighEnergyPhysics,LaboratoryofNuclearAnalysisTechniques,theChineseAcademyofSciences,P.O.Box2732,Beijing100080)ABSTRACTTheextractionandback-extractionbehaviourofAs(Ⅲ)andAs(Ⅴ)inAPDC-CCl4sys-temhavebeenstudied.As(Ⅲ)canbeextractedquantitativelybyAPDC-CCl4systematpH=1—3.As(Ⅴ)canbeextractedafterbeingreducedtoAs(Ⅲ)byNa2S2O3.WaterwithhighpHvaluecanbeusedforback-extraction.Themethodcanbeappliedintheseparationofin-organicAs(Ⅲ)andAs(Ⅴ)inwaterqualityinspection.KeywordsArsenicChelatecompoundSeparation