An ion-coupling model has been proposed to predict and interpret the occurrence of mass shifts induced by the presence of ions of other m/z ratios in the ion trap mass spectrometer. The method of dynamically scanning the dipolar tickle frequency has been used to determine the mass shifts for two spe
Estimation of the polarizability of gaseous ions by ion trap mass measurements
โ Scribed by O. Bortolini; S. Catinella; P. Traldi
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 432 KB
- Volume
- 28
- Category
- Article
- ISSN
- 1076-5174
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โฆ Synopsis
Significant mass displacements from the expected instrumental value have been observed in ion-trap experiments on several ionic species. This phenomenon has been extensively investigated and interpreted as the result of an interaction between the analyte and the radio-frequency field present within the ion trap. Depending on the chemico-physical characteristics of the analytes, deformation of the electron shell and forced alignment of the permanent dipoles may be induced. These two effects can be separated allowing an estimation of the polarizability related to the permanent dipoles for gaseous ions.
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