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流动注射仪测定水中氰化物两种方法的对比.docx

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流动注射仪测定水中氰化物两种方法的对比 Title:AComparativeStudyofTwoMethodsforDeterminingCyanideinWaterUsingFlowInjectionAnalysis Abstract: Cyanideisahighlytoxiccompoundthatcanbefoundinvariousindustrialprocessesandnaturalsources.Accurateandrapidmethodsfordeterminingcyanideconcentrationsinwaterareessentialforenvironmentalmonitoringandsafeguardinghumanhealth.Inthisstudy,wecomparedtwomethodscommonlyusedinflowinjectionanalysis(FIA)forcyanidedeterminationinwater:thespectrophotometricmethodandtheelectrodemethod.Theaimwastoevaluatetheiraccuracy,precision,andeaseofuse. Introduction: Cyanideisapotentpoisonthatcancauseseverehealtheffectsevenatlowconcentrations.Thepresenceofcyanideinwatersourcesmaybenaturalortheresultofindustrialactivitiessuchasmining,metallurgy,andchemicalmanufacturing.Therefore,thereisanurgentneedforreliableandefficientmethodstomeasurecyanideconcentrationsinwater.FIAisawidelyusedtechniqueknownforitssimplicity,speed,andlowcost.ThisstudyaimstocomparetwoFIAmethodsforcyanidedetermination:spectrophotometryandelectrode-basedmeasurement. MaterialsandMethods: Samplesofwaterwerecollectedfromvarioussources,includingindustrialeffluentsandnaturalwaterbodies.Thespectrophotometricmethodinvolvedtheadditionofacyanide-selectivereagentthatformsacoloredcomplexwithcyanide.Thiscomplexwasthenmeasuredusingaspectrophotometer.Theelectrodemethodutilizedacyanide-selectiveelectrodethatgeneratedameasurablepotentialchangeinthepresenceofcyanide.Bothmethodswereperformedusinganautomatedflowinjectionanalyzer. Results: Theresultsobtainedfrombothmethodswerecomparedintermsofaccuracy,precision,andeaseofuse.Thespectrophotometricmethodshowedhighaccuracyandprecision,withlowdetectionlimits.However,itrequiredcarefulsamplepreparation,includingpHadjustment,andhadalongeranalysistime.Theelectrodemethod,ontheotherhand,providedrapidmeasurementsandrequiredminimalsamplepreparation.However,itshowedloweraccuracyandprecisioncomparedtothespectrophotometricmethod. Discussion: Thespectrophotometricmethoddemonstratedsuperioraccuracyan