Estimation of effective ion temperatures in a quadrupole ion trap

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Abstract

A modified Finnigan LCQ quadrupole ion trap has been used to determine the equilibrium constant of the complexation reaction of thiophenolate with 2,2,2-trifluoroethanol. The process is particularly useful as a thermometer reaction because it has an exceptionally large temperature dependence. Using literature values for the thermochemistry, an effective ion temperature of 310 ± 20 K is indicated for the ion trap. This value is much lower than some earlier estimates for ion traps, but is consistent with a recent theoretical analysis and some previous interpretations of experimental data. The results suggest that quadrupole ion traps are suitable for studying gas phase reactions under nearly thermal conditions. Copyright © 1998 Elsevier Science Inc.

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Gronert, S. (1998). Estimation of effective ion temperatures in a quadrupole ion trap. Journal of the American Society for Mass Spectrometry, 9(8), 845–848. https://doi.org/10.1016/S1044-0305(98)00055-5

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