Evaluation of carrier gases for use in high-field asymmetric waveform ion mobility spectrometry
Evaluation of carrier gases for use in high-field asymmetric waveform ion mobility spectrometry
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DOI：
10.1016/s1044-0305(00)00187-2
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发表时间：
2000-12-01
影响因子：
3.2
通讯作者：
Guevremont, R
中科院分区：
文献类型：
--
作者：
Barnett, DA;Ells, B;Guevremont, R
研究了载气类型（N-2、O-2、CO2、N2O和SF6）对铯、禾草菌素S、四己胺、十六烷酸和天冬氨酸在67td范围内高、低场离子迁移率（K-h/K）变化的影响。讨论了不同气体中高E/N离子迁移的理论。利用高持度非对称波形离子迁移率谱仪收集的实验数据，得出了每种气体中五种离子的K-h/K随离子能参数E/N的函数图。铯在O-2和N-2载气中高、低场离子迁移率的变化与文献值非常吻合。利用铯在O-2和N-2中的行为说明，只要相互作用势的井深明显超过热能，K-h/K作为有效温度的函数与气体类型不变。从这些结果来看，这里研究的较重离子，包括gramicidin S， tetrahexylam铵和十七烷酸，与浴气（如N-2和O-2）的相互作用势的井深相对于热能来说是浅的。[J] .质谱分析，2003,11(2):1 - 4。
Effects of carrier gas type (N-2, O-2, CO2, N2O, and SF6) on changes in the ratio of high- to low-field ion mobility, K-h/K, of cesium, gramicidin S, tetrahexylammonium, heptadecanoic acid, and aspartic acid in fields of up to 67 Td are presented. The theory of the mobility of ions at high E/N in different gases is discussed. Plots of K-h/K as a function of the ionic energy parameter, E/N, for the five ions in each of the gases were derived from experimental data collected using a high-held asymmetric waveform ion mobility spectrometer. The change in the ratio of high- to low-field ion mobility of cesium in carrier gases of O-2 and N-2 showed excellent agreement with literature values. The behavior of cesium in O-2 and N-2 is used to illustrate that the ratio K-h/K as a function of effective temperature is invariant with gas type as long as the well depth of the interaction potential significantly exceeds thermal energy. From these results, it appears that the well depth of the interaction potential of the heavier ions studied here, including gramicidin S, tetrahexylammonium, and heptadecanoic acid, with bath gases such as N-2 and O-2 is shallow relative to thermal energy. (J Am Soc Mass Spectrom 2000, 11, 1125-1133) (C) 2000 American Society for Mass Spectrometry.