鉭、鈮礦石中砷、銻測定的FI-HGAAS法研究.pdf

1、中南工業(yè)大學碩士學位論文鉭、鈮礦石中砷、銻測定的FIHGAAS法研究姓名：張彥軍申請學位級別：碩士專業(yè)：分析化學指導教師：嚴規(guī)有2000.6.1ABSTRACTRecentlyhydridegenerationatomicabsorptionspectrometryhasbeenextensivelyappliedtodeterminethevolatileelementssuchasAs、Sb、Bietc，withrapid、simp

2、leandhighersensitivity(103104timesthatoftheflameatomicabsorptionspectrometry)。Flowinjectioninputtechniquesandhydridegenerationatomicabsorptionspectrometrywereadoptedinthispapertodeterminatethemicroarsenicandantimonyintan

3、talumandniobiumoreTheinterferenceofTa、NbandcompanyelementssuchasTi、W、Moatecouldbeeliminatedbyaddingusingagent(10％KI5％thiourea5％Vc)andseparatingtechniquesoflaydrideAonlinereductionFIHGAASsystemtodeterminateAs、Sbwasestabli

4、shedinthispaperInthesystemtheaciditythatcallbeacceptedinconventionanalysiswasadoptedandtheconsumptionofreagentssuchasKIwasgreatlydecreasedTheoptimumtermsweredefinedasfollows：Atomizationtemperature：900“C；Timeofcollections

5、ample：8s；Ar‘sVelocityofflow：600nll／min；Aeidity：3mol／lHCL；ConcentrationofKBH4：O5％：Inthisterms，therelationbetweenabsorptivityandconcentrationofAs(II)andSb(1I)waslinearintherangeof04pg／50m1Theresultshowedthereco_、7eryratiow

6、as90110％，thesensifivityandaccuracyofthemetllodwassatisfiedThemethodhasbeenapphedtoanalyzeAs、SbinTa、NborefromNINGXIADONGFANGTANTALUMSTOCKCOMPANYandtheresultwassarisfiedItwasusedtoensuregoodqualificationofrawmaterialandsta