ICP-AES法测定陶瓷UO_2芯块粉末标准物质中Al、Ba、Co、Ta、Ti和V

    • 摘要: 采用237季铵萃淋树脂和萃取色谱分离技术,在6.5mol/LHNO3介质中定量分离陶瓷UO2芯块粉末标准物质中铀与待测杂质元素。用ICP直读光谱仪同时测定流出液中Al、Ba、Co、Ta、Ti和V。分析结果均在标准值的置信区间内,相对标准偏差sr<7.5%。取样300mg时,测定下限为(0.016—0.250)×10-6。

       

      Abstract: DETERMINATIONOFTRACEELEMENTSINCERAMICURANIUMDIOXIDEPELLETSPOWDERSCRMsBYICP┐AESLiuHushengLiJun(BeijingResearchInstituteofChemicalEngineringandMetalurgy,Beijing101149)ABSTRACTThe237-quaternaryammoniumextractionresinchromatographyisusedtoseparation6traceelementsinceramicuraniumdioxidepeletspowders,whichareusedascertifiedrefer-encematerials(CRMs).Thesampleisdissolvedin6.5mol/LHNO3anduraniumisseparat-edbychromatographiccolumn.The6traceelementsAl,Ba,Co,Ta,TiandVcontainedintheelutriantaredeterminedusingICPdirectlyreadingspectrometer.Fora300mgsample,thelowestdeterminableconcentrationofimpuritiesinceramicUO2peletspowdersCRMsis(0.016—0.250)×10-6.Therelativestandarddeviationislessthan7.5%.TheproposedmethodprovidesexcelentandaccurateanalyticaldatafortheceramicUO2peletspowderssamples(CRMs).KeywordsICP-AES237-QuaternaryammoniumextractionresinCeramicUO2peletspowdersCRMsImpurityelements

       

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