摘要
Oxide interference correction plays a vital role in the accurate determination of trace element compositions of geological samples by inductively coupled plasma-mass spectrometry(ICP-MS).In this study,we found that the oxide production is mainly controlled by the gas flow of the ICP-MS and a constant oxide correction factor(OCF)can be measured during a routine analysis.Thus,we can obtain the oxide production by just investigating the gas flow for a fixed ICP-MS system with monitoring of OCF.Si,Ba and LREE oxide interferences on the Sc,Eu and Gd of four geological standard samples GSP-2,JP-1,GBW03112 and GBW03113 were corrected by such method and the results were in good agreement with the recommended values.Therefore,the present study provides a simple and fast correction method for the oxide interferences of the geological samples during the routine analyses.Furthermore,a Microsoft Excel spreadsheet template integrating the correction equations was developed in an in-house software(ICPMSData Cal)for effective calibration.
Oxide interference correction plays a vital role in the accurate determination of trace element compositions of geological samples by inductively coupled plasma-mass spectrometry(ICP-MS). In this study,we found that the oxide production is mainly controlled by the gas flow of the ICP-MS and a constant oxide correction factor(OCF) can be measured during a routine analysis. Thus,we can obtain the oxide production by just investigating the gas flow for a fixed ICP-MS system with monitoring of OCF. Si,Ba and LREE oxide interferences on the Sc,Eu and Gd of four geological standard samples GSP-2,JP-1,GBW03112 and GBW03113 were corrected by such method and the results were in good agreement with the recommended values. Therefore,the present study provides a simple and fast correction method for the oxide interferences of the geological samples during the routine analyses. Furthermore,a Microsoft Excel spreadsheet template integrating the correction equations was developed in an in-house software(ICPMSData Cal) for effective calibration.
基金
supported by the National Natural Science Foundation of China (Nos. 41473031,41530211)
the MOST Special Fund from the State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan (No. MSFGPMR01)
