O, N determination in titanium samples

文档简介SuitableanalyzersnON900nONH2000UsedaccessoriesnInnergraphitecrucibles(90180)nOutergraphitecrucibles(90185)nNickelbasket(90250)orAR2344nSuitablecalibrationmaterial(NISTorother)SettingsnComparatorlevel:20mVnMinimumtime:15secnMaximumtime:3:00minnPostwaiting:30secnBaselinedeviation:200mV;Step:16mV;Time:10secnMode:continuousnOutgasTime:45secPower:6kWnTimePurge:20secStability:45secnIntegrationdelayIRcell:2secTCcell:10secnAnalyse(1)Time:75secPower(1):6kWPower(2):6kWSamplepreparationMakesurethatthesurfaceofthetitaniumisfreefromcontaminations;otherwisecleanthesamplewithacetonep.a.andletdryatatmosphere.ProcedurenPrepareELTRAanalyzer(exchangeanhydrone,sodiumhydroxide,copperoxidewhennecessary),cleanfurnace,sampledropmechanism,electrodetipnRunthreeblankswithemptycruciblesnCalibratetheanalyzerwithsuitablecalibrationmaterial(NISTorother)(1)Filloneemptyinnercrucible(90180)inoneoutercrucible(90185)andplacethemontheelectrodetip,closefurnace(F2Button)(2)Weighcalibrationmaterialandgiveitintoanickelbasket(90250orAR2344)(3)Placenickelbasketwithcalibrationmaterialorsampleinthesampledropmechanismandstartanalysis(F5Button)Afteranalysisgivetheinnercrucibleintowasteandfillinanewone.Theoutercruciblescanbeusedapproximately10times.Repeatsteps(1)(3)atleastthreetimes;Marktheresultsandusethecalibrationfunctioninthesoftware.