摘要
LA-MC-ICP-MS offers the ability to directly measure small variations in isotope composition at the micrometer scale in geological samples.However,when analyzing isotope ratios in complex minerals,mass spectrometric interferences from themselves and isotopic mass fractionation arising from the analytical process need to be carefully corrected.The lack of professional software to visualize and process raw data presents a significant challenge for all of LA-MC-ICP-MS labs.Moreover,the rapid development of instruments and the innovations in micro-analytical techniques necessitate specialized software to complete the complex correction and improve efficiency,such as for in situ isochron dating or new linear regression correction techniques.In this study,Plume,a free data processing software,was developed specifically for isotopic data processing in LA-MC-ICP-MS.The software provides a comprehensive set of functions,including baseline correction,signal selection and integration,mass spectrometric interference correction,isotopic fractionation correction,uncertainty propagation,delta value calculation,and real-time data processing.It also supports a complete correction workflow for the latest isochron dating using LA-(MC)-ICP-MS/MS,including isotopic and elemental ratios correction,the isochron drawing,and age calculation for multiple models.Additionally,a dedicated linear regression calculation unit has been developed in Plume to specialize in data processing of low signal-to-noise ratio or high spatial resolution analysis.These new features expand the application range of LA-MC-ICP-MS and improve work efficiency through batch processing.
基金
supported by the National Key Research and Development Program of China(Grant No.2024YFF0808200)
the National Natural Science Foundation of China(Grant Nos.42330104,42473035)
Hubei Provincial Natural Science Foundation of China(Grant No.2025AFA005)
the Most Special Fund from the State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences(Grant Nos.MSFGPMR04 and MSFGPMR08)。
