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- W2019438554 abstract "The efficiency of kinetic energy discrimination and bandpass tuning for the suppression of potentially interfering product ions, formed by ion–molecule reactions in a dynamic reaction cell of an inductively coupled plasma mass spectrometer is compared. Suppression of the oxide ions from Sc+, Y+, La+ and Th+, formed in reactions with oxygen impurities in non-reactive gases, have been used as test system to determine the suppression efficiency of the in-cell generated ions in dependence of the operating parameters of a dynamic reaction cell. Kinetic energy discrimination was investigated by successively lowering the pole bias voltage of the reaction cell quadrupole below the pole bias of the analyser quadrupole to create a potential barrier of increasing height. For bandpass tuning, the transmission window of the reaction cell quadrupole was successively narrowed to determine the cut-off m/z, where precursors of the product ions are rejected. The efficiency of interference suppression and the elemental sensitivity are in all cases decreasing with m/z of the precursor ions. Both approaches allow the suppression of the in-cell generated ScO+ and YO+, while LaO+ and to a greater extent ThO+ cannot be fully eliminated without compromising elemental sensitivity significantly. LaO+ and ThO+ are observed at levels, which are by a factor of two and six higher than in standard operation of the ICP-MS. Elemental sensitivity is higher by approximately a factor of five and the abundance of the cell produced ions is reduced more effectively with the bandpass tuning approach when compared to kinetic energy discrimination." @default.
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- W2019438554 date "2004-01-01" @default.
- W2019438554 modified "2023-09-23" @default.
- W2019438554 title "Suppression of in-cell generated interferences in a reaction cell ICP-MS by bandpass tuning and kinetic energy discrimination" @default.
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- W2019438554 doi "https://doi.org/10.1039/b312155k" @default.
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