CHI660D测试方法原理

Chapter4.SetupMenu________________________________________________________________________4-1TechniqueCommandUsethiscommandtoselectanelectrochemicaltechnique.ThiscommandpresentsanElectrochemicalTechniquesdialogbox:Thefollowingoptionsallowyoutoselectanelectrochemicaltechnique:TechniqueSelectionSelecttheelectrochemicaltechniqueyouwanttouse.Thisboxliststhetechniquesavailableintheinstrument.DoubleclickingthetechniqueyouwanttoselectisequivalenttoselectingthetechniqueandclickingtheOKbutton.PolarographicModeCheckthisboxwillenablethepolarographicmode.Inthepolarographicmode,themercurydropwillbeallowedtogrowandbedislodgedforeverydatapoint.Onlyafewtechniquesareallowedtohavepolarographicmode:SamplingCurrent(Staircase)Polarography(SCP),DifferentialPulsePolarography(DPP),NormalPulseChapter4.SetupMenu________________________________________________________________________4-2Polarography(NPP),DifferentialNormalPulsePolarography(DNPP),A.C.Polarography(ACP),andSecondHarmonicA.C.Polarography(SHACP).Oncepolarographicmodeisenabled,strippingmodeisdisabled.InordertosetstrippingmodebyusingtheStrippingModecommandinControlMenu,youhavetouncheckthepolarographicmode.Thiscommandhasatoolbarbutton:Chapter4.SetupMenu________________________________________________________________________4-3ParametersCommandUsethiscommandtosetexperimentalparameters.ThiscommandpresentsaParameterdialogboxsoyoucanselecttheparametersyouwanttouse.Dependingonthetechnique,theparametersdialogboxwillbedifferent.Thefollowingsaretheparametersfordifferenttechniques:ParametersforCyclicVoltammetryParametersforLinearSweepVoltammetryParametersforSampledCurrentVoltammetryParametersforTafelPlotParametersforChronoamperometryParametersforChronocoulometryParametersforDifferentialPulseVoltammetryParametersforNormalPulseVoltammetryParametersforDifferentialNormalPulseVoltammetryParametersforSquareWaveVoltammetryParametersforA.C.VoltammetryParametersfor2ndHarmonicA.C.VoltammetryParametersforAmperometrici-tCurveParametersforDifferentialPulseAmperometryParametersforDoubleDifferentialPulseAmperometryParametersforTriplePulseAmperometryParametersforIntegratedPulseAmperometricDetectionParametersforBulkElectrolysiswithCoulomteryParametersforHydrodynamicModulationVoltammetryParametersforSweep-StepFunctionsParametersforMulti-PotentialStepsParametersforA.C.ImpedanceParametersforImpedance-TimeParametersforImpedance-PotentialParametersforChronopotentiometryParametersforChronopotentiometrywithCurrentRampParametersforMulti-CurrentStepsParametersforPotentiometricStrippingAnalysisParametersforOpenCircuitPotential-TimeFordetailsoftheparametersofeachtechnique,seethedescriptionofindividualdialogboxofrelatedtechniques.Thiscommandhasatoolbarbutton:Chapter4.SetupMenu________________________________________________________________________4-4ParametersforCyclicVoltammetryInCyclicVoltammetry(CV),potentialisscannedfromInitEtowardeitherHighEorLowEdependingontheInitP/N.Thepotentialwillthenscanback.Thefollowingdiagramshowsthepotentialwaveformappliedasthefunctionoftime.Thecurrentisrecordedasthefunctionofpotential.Thefollowingaretheexperimentalparameters,theirrangeanddescriptions:ParametersRangeDescriptionInitE(V)-10-+10InitialpotentialHighE(V)-10-+10HighlimitofpotentialscanLowE(V)-10-+10LowlimitofpotentialscanInitP/NPositiveorNegativeInitialscandirectionScanRate(V/s)1e-6-20000PotentialscanrateSweepSegments1-1000000Sweepsegments,eachsegmentsishalfcycleSampleInterval(V)1e-6-0.064DatasamplingintervalQuietTime(sec)0-100000QuiescenttimebeforepotentialscanSensitivity(A/V)1e-12-0.1SensitivityscaleAutoSensCheckorUncheckAutomaticsensitivityswitchingduringrunScanCompleteCyclesCheckorUncheckScancompletecyclesAuxiliarySignalRecordingCheckorUncheckSimultaneouslyexternalsignalrecordingwhenthescanrateislessthan0.25V/sNotes:Potential(V)InitETime(s)HighEScanRate(V/s)Segment1Segment2Segment3LowEChapter4.SetupMenu________________________________________________________________________4-51.HighEandLowEshouldbeatleast0.01Vapart.2.IfunreasonableHighEandLowEareentered,thesystemwillautomaticallyreadjustthem.3.DependingontheInitE,HighEandLowEvalue,thesystemwillautomaticallyreadjustinitialscandirection.4.Themaximumpotentialscanrangeis13.1V.5.Thepotentialincrementis0.1mVifthescanrateisbelow500V/s.Thepotentialincrementis1mVatthescanrateof5000V/s,and4mVat20000V/s.6.Thesampleintervalcanbe1mVWhenthescanrateisbelow1000V/s.Thesampleintervalis2mVatthescanrateof2000V/s,5mVat5000V/s,and20mVat20000V/s.Ifthescanrateishigh,thedatasamplingintervalwillbeautomaticallyincreased.7.Whenlargenumberofsweepsegmentsareinvolved,thedatasamplingintervalwillbeautomaticallyincreasedupto0.02V.Ifthescanrateishigherthan0.5V/s,thenumberofsweepsegmentswillbelimitedbythememorysize(64000points).Ifthescanrateisbelow0.5V/s,themaximumdatalengthsetbytheSystemcommandwilltakeeffect.Whenthescanrateislow,thespecifiedsweepsegmentswillbeexecuted,butonlylimitednumberofsegmentswillbestored.Largesweepsegmentsmightbeusefulforconditioningofelectrodes.8.Whenscanrateisbelow0.01V/s,thesen