基于MC-ICP-MS测定水中铀同位素比值的富集方式对比研究-豆柴文库

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基于MC-ICP-MS测定水中铀同位素比值的富集方式对比研究
Abstract:
Inthisstudy,wecomparedtwoenrichmentmethodsforthedeterminationofuraniumisotopicratioinwaterusingMC-ICP-MS.Theaimofthisresearchwastoidentifythemethodthatprovidesthemostaccurateandpreciseresults.Thetwomethodscomparedwereliquid-liquidextraction(LLE)andsolid-phaseextraction(SPE).Theresultsshowedthatbothmethodsarecapableofeffectivelyenrichingandmeasuringuraniumisotopes,buttheSPEmethodexhibitedhigheraccuracyandprecision.Therefore,werecommendtheuseofSPEforthedeterminationofuraniumisotopicratioinwatersamples.
1.Introduction
Uraniumisanaturallyoccurringradioactiveelementthatcanbefoundinvariousgeologicalformations.Duetoitspotentialhealthrisks,itisimportanttoaccuratelydetermineitsisotopicratioinwatersamples.Theisotopicratioofuraniumcanprovidevaluableinformationaboutitssourcesandtransportintheenvironment.MC-ICP-MSisacommonlyusedtechniqueforthedeterminationofuraniumisotopicratioduetoitshighsensitivityandprecision.
2.Methods
2.1SampleCollection
Watersampleswerecollectedfromvarioussources,includingrivers,lakes,andgroundwater.Thesampleswerestoredinacid-washedpolyethylenebottlestominimizecontamination.
2.2Liquid-LiquidExtraction(LLE)
TheLLEmethodinvolvedtheextractionofuraniumusingasolventsystemcomposedofdiethyletherandtri-n-butylphosphate.Thewatersamplewasacidifiedwithhydrochloricacidandmixedwiththesolventsystem.Theuraniuminthewatersamplepartitionedintotheorganicphase,whileimpuritiesremainedintheaqueousphase.Theorganicphasewasthencollectedanddriedforanalysis.
2.3Solid-PhaseExtraction(SPE)
TheSPEmethodutilizedasolidsorbentmaterialtoselectivelybindandretainuranium.ThewatersamplewaspassedthroughaSPEcartridgecontainingaresinwithhighaffinityforuranium.Thecartridgewasthenwashedtoremoveimpurities,andtheuraniumwaselutedwithasuitableeluent.Theeluatewascollectedanddriedforanalysis.
3.ResultsandDiscussion
Theuraniumisotopicratiosobtainedfrombothmethodswerecompared.TheresultsshowedthattheSPEmethodconsistentlyprovidedhigheraccuracyandprecisioncomparedtothe