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标题：Deconvolution and compensation of mass spectrometric overlap interferences with the miniRUEDI portable mass spectrometer
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作者：Matthias S. Brennwald ; Yama Tomonaga ; Rolf Kipfer 等
期刊名称：MethodsX
印刷版ISSN：2215-0161
电子版ISSN：2215-0161
出版年度：2020
卷号：7
页码：1-11
DOI：10.1016/j.mex.2020.101038
语种：English
出版社：Elsevier
摘要：Graphical abstractDisplay OmittedAbstractThe miniRUEDI is a portable mass spectrometer system designed for on-site analysis of gases in the environment during field work and at remote locations. For many gas species (e.g., He, Ar, Kr, N2, O2, CO2) the ion-current peak-heights measured with the mass spectrometer can usually be calibrated in terms of the partial pressures by simple peak-height comparison relative to a gas standard with well known partial pressures. However, depending on the composition of the analysed gases, the ion currents measured at certainm/zratios may result from overlapping signals of multiple species (for example CH4, O2and N2atm/z=15and 16; or Ne, Ar and H2O atm/z=20).Here, we present a method extension to the existing miniRUEDI peak-height comparison in order to resolve such overlap interferences:• We developed and tested a data processing procedure for accurate deconvolution and compensation of such mass-spectrometric overlap interferences.• The method was incorporated into the miniRUEDI open-source software (ruediPy).• The method substantially improves the analytical accuracy in situations where mass-spectrometric interferences cannot be avoided.
关键词：Isobaric ions;Environmental gases;ruediPy