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1、SECRETARIATUSEHeadershouldbeblank.SECRETARIATUSEFootershouldbeblankTheDeterminationofMicroStibiumTraceBismuthinSteelbySparkOESYUBishuang，WANGHan(ManufacturingManagementDepartmentBaosteelBranchShanghai200941China)Abstract

2、:ThispaperdescribesapracticeonanalysisofmicrocontentStibiumtraceBismuthinsteelbySparkOESgivestheresultsanalysisrelativetothestabilityofthebasicinterferencebackgroundtestinglimitsprecisionaccuracyofthemethodonapointofview

3、insteelmakingapplication.Keywds:SparkOES；Stibium；Bismuth0IntroductionAssomeriousimpurityelementsinthesteelsuchasAsSnPbSbBiwillcausetheoccurrenceof‘redsht’phenomenainthesteelmaterialitisrequiredtocontroltheseimpurityeleme

4、ntsduringsteelmakingwhichneedscrespondingchemicaldeterminemeasurestocodinatethesteelmakingprocess.TherearealreadyanalysismethodsofrelativeelementsapplicationreptsbothinChinaabroadfexampleHanDanSteelusessparkOEStoanalyzeA

5、s、Sn、Pb、Sb、Biinthesteel[1]BaoTouSteelhasbeenintheresearchofusingARL3410ICPofspectrumtoanalyzeAs、Sn、Pb、Sb、Biinthecommoncarbonsteellowalloysteel[2]etc.HowevertherearerelativemetraditionalchemicalanalysismethodsofmeasuringS

6、bBiHydrideAtomicAbsptionSpectrophotometry(AAS)AtomicAbsptionSpectrophotometry(AAS)whichtheanalysiscycleislongtheanalysisrangeislimitednmallythedetermininglimitisabout10gg.AtpresentthereisalsoFlowInjectionIonExchangeChrom

7、atographyFlameEmissionAtomicAbsptionSpectrophotometrywhichcanreach1ggbuttheanalysiscycleislonganalysismeasuresarecomplicatedsoitcannotkeepupwiththesteelmakingproducingprocess.Indertomeettherequirementofprocesswehaveestab

8、lishedtheanalyzingmethodofapplyingSparkOEStoanalyzemicrocontentStibiumthetraceBismuthinsteelwhichcanreachthefinedeterminingprecisionlargelyraisedanalysisefficiencyshtenedtheanalysiscyclesothatitcanmeettheproducingrequire

9、ment.1Experiment1.1AnalysisInstrumentSwitzerlARL4460typeSparkOES1.2WkingparametersAnalyticalcondition:preintegrationtime5sintegrationtime3.5sAnalyticallineed:lineSb217.58nmlineBi306.77nminternalstardsFe273.07nmArgonpurit

10、y:99.999%.2Resultsdiscussion2.1CalibrationcurveSECRETARIATUSEHeadershouldbeblank.SECRETARIATUSEFootershouldbeblankOnthepremisesofingthesuitableanalysisconditionbetterinspiringconditioningthestardsamples(AnSteel06)(GSBH40

11、072941)theintensityofwhichapproachestothebackgroundvaluemakethebackgroundstabilitytestingcontinuous11timesintensitymeasuringfStibiumBismuthrespectively.theresultsareasshowninthetable2table3.Table2BackgroundStabilityTestD

12、ataofStibiumIntensitycps0.03518，0.03520，0.03534，0.03523，0.03531，0.03576，0.03558，0.03528，0.03574，0.03561，0.03553Averagevaluecps0.03543Rangecps0.00058Starddeviation％0.00022Relativestarddeviation％0.6125Table3BackgroundStabi

13、lityTestDataofBismuthIntensitycps0.04754，0.04777，0.04738，0.04727，0.04785，0.04735，0.04756，0.04758，0.04787，0.04726，0.04752Averagevaluecps0.04754Rangecps0.00061Starddeviation％0.00022Relativestarddeviation％0.4595Itcanbeseenf

14、romthetable23whenthebackgroundintensityofStibiumBismuthisabout0.03543cps0.04754cpsthestarddeviationsfcontinuous11timesanalysisarealways0.00022％therelativestarddeviationsare0.6125％0.4595％respectivelywhichmeanstherathersta

15、blebackgroundguaranteedtheanalysisprecisionofStibiumBismuth.2.3CalculationofdeterminablelimitAccdingtothecalculationfmulaoftheeticaldeterminablelimit:DL=3?BEC?RSDthetheeticaldeterminablelimitofStibiumBismuthcanbecalculat

16、edrespectively.ThereffStibiumBECvalueis0.00629％(referto3.1)RSDis0.6125％(referto3.2)soitcanbecalculatedthatDLtheetical=0.00012％samefBismuththeBECvalueis0.012935％(referto3.1)RSDis0.4595％(referto3.2)soitcanbecalculatedthatD

17、Ltheetical=0.00017％whichprovidedthetheeticalbasisofexactlyanalyzingStibiumBismuth.2.4PrecisiontestsMaketheprecisiontestsofcontinuous11timesanalysisonninestardsamples(amongwhichthefmerfivearetoanalyzeStibiumtheotherfourar

18、etoanalyzeBismuth)respectivelytheresultsareasshownintable4.Table4PrecisionTestData%No.AnSteel06GSBH40072941GSBH40072944GSBH40067935GSBH40067936GSBH40072946GBW01365SUSRN1346GBW0136710.000940.001340.002880.007400.04230.000

19、080.000740.000930.0030520.001000.001320.002870.007360.04250.000090.000680.000940.0031730.000980.001340.002990.007450.04360.000050.000630.000990.0030340.000940.001300.002850.007420.04250.000050.000590.000890.0031050.00096

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