吸附伏安法测定高纯铝中痕量钛_英文_new

《吸附伏安法测定高纯铝中痕量钛_英文_new》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、第26卷第2期上海第二工业大学学报Vol.26No.22009年6月JOURNALOFSHANGHAISECONDPOLYTECHNICUNIVERSITYJun.2009文章编号:1001-4543(2009)02-0105-05DeterminationofTraceTitaniuminHighPurityAluminumbyAdsorptionVoltammetry12GAOGui-lan,YANGui-you（1.SchoolofUrbanDevelopmentandEnvironmentalEngineering,ShanghaiSecondPolytechnicUniversi

2、ty,Shanghai201209,P.R.China;2.DepartmentofChemistryandChemicalEngneering,CentralSouthUniversity,Changsha410083,P.R.China）Abstract:Titanium(Ⅳ)reactswithN-benzoyl-N-phenylhydroxylamine(BPHA)toformacomplex,whichcanbeusedtodetermineTitaniumbyadsorptionvoltammetryataglassycarbonelectrode(GCE).Theexperi

3、mentalconditionsandtheinfluence-1offoreignionsonthedeterminationwereinvestigated.Thecurrent-concentrationcurvewaslinearintherangeof0.06to2ng.ml-1Tiatadepositiontimeof2minat–0.3V.Thedetectionlimitwas0.0076ng.ml.Themethodhasbeenprovedtobeofhighsensitivityandtobeeasytooperate.Theprocedurehasbeenappli

4、edtothedeterminationoftraceTitanium(Ⅳ)inhighpurityaluminumandthesamplesresultsweresatisfactory.Keywords:Titanium;BPHA;adsorptionvoltammetry;glassycarbonelectrodeCLCnumber:O657.14Documentcode:A0IntroductionVoltammetryprecededbyadsorptivecollectionofcomplexesontheelectrodehasbecomeasensitiveand[1-4]

5、effectivemethodforthedeterminationofavarietyoftracemetals(Al,Pd,Pb,Cu,etc.).Thesensitivityofthistechniqueisveryhighasaresultoftheefficient(100%)reductionoftheadsorbedcomplexes,andthemethodis[5]applicabletomanytraceelementsastheonlyrequirementisthatanadsorbableandreduciblecomplexisformed.[6]Titaniu

6、mcanbedeterminedbyadsorptionvoltammetryinacidicsolutionsorinsolutioncontainingchelating[7][8][9-10]agentssuchascupferron,beryllonⅢandvariousheterocyclicazo-compounds.BPHAisawide-bandchelatingagentwhichformscomplexeswithvariouscations.Anewsensitiveadsorptionvoltammetryfordeterminationoftitanium(Ⅳ)w

7、ithBPHAisdescribedinthispaperforthefirsttime.Itisfoundthatareproducible,largereductionpeakisobtainedforTiinthepresenceofBPHA.TheGCEwasusedinthismethodbecauseofitsmanyadvantages,suchastheeaseofpreparation,nonpoiso