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- W2070781205 abstract "The use of different drift gases to alter separation factors (α) in ion mobility spectrometry has been demonstrated. The mobility of a series of low molecular weight compounds and three small peptides was determined in four different drift gases. The drift gases chosen were helium, argon, nitrogen, and carbon dioxide. These drift gases provide a range of polarizabilities and molecular weights. In all instances, the compounds showed the greatest mobility in helium and the lowest mobility in carbon dioxide; however the percentage change of mobility for each compound was different, effectively changing the α value. The α value changes were primarily due to differences in drift gas polarizability but were also influenced by the mass of the drift gas. In addition, gas-phase ion radii were calculated in each of the different drift gases. These radii were then plotted against drift gas polarizability producing linear plots with r2 values greater than 0.99. The intercept of these plots provides the gas-phase radius of an ion in a nonpolarizing environment, whereas the slope is indicative of the magnitude of the ion's mobility change related to polarizability. It therefore, should be possible to separate any two compounds that have different slopes with the appropriate drift gas." @default.
- W2070781205 created "2016-06-24" @default.
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- W2070781205 date "1999-12-31" @default.
- W2070781205 modified "2023-10-07" @default.
- W2070781205 title "Using Different Drift Gases To Change Separation Factors (α) in Ion Mobility Spectrometry" @default.
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- W2070781205 doi "https://doi.org/10.1021/ac9908952" @default.
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