Effect of additives in a carrier gas on the behavior of ions in an ion-mobility increment spectrometer
Effect of additives in a carrier gas on the behavior of ions in an ion-mobility increment spectrometer
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DOI：
10.1134/s1061934808120083
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发表时间：
2008-12-01
影响因子：
1.1
通讯作者：
Pervukhin, V. V.
中科院分区：
文献类型：
--
作者：
Pervukhin, V. V.
用离子迁移率增量光谱仪(IMIS)与质谱仪(MS)联用，研究了空气中添加剂(乙醇、醋酸、水、氯仿和丙酮)对H+(C(6)H(5)NH(2))离子光谱变化的影响。结果表明，添加剂的存在可以提高仪器的分辨率和方法的灵敏度。在空气中饱和乙醇蒸气时，分辨率提高了四倍，而在载气中加入乙醇和醋酸的混合物，灵敏度提高了11倍。添加剂浓度的依赖关系表明，团簇的形成是产生这些效应的原因。载气中乙醇蒸气的存在几乎完全消除了目前水蒸气的影响；因此，无需干燥即可在综管信息系统-质谱仪中使用饱和了乙醇蒸气的空气。
The effect of additives (ethanol, acetic acid, water, chloroform, and acetone) in air used as the carrier gas on the changes in the spectra of the H+(C(6)H(5)NH(2)) ion was studied for an ion-mobility increment spectrometer (IMIS) operating in tandem with a mass spectrometer (MS). It was shown that the presence of additives could improve both the resolution of the instrument and the sensitivity of the method. The resolving power was increased fourfold using air saturated with an ethanol vapor, while the sensitivity was increased 11-fold upon adding a mixture of ethanol and acetic acid to the carrier gas. The dependences on the concentration of the additives indicate that the formation of the clusters is the reason for these effects. The presence of an ethanol vapor in the carrier gas almost completely eliminates the effect of the present water vapor; therefore, air saturated with ethanol vapors can be used in the IMIS-MS instruments without drying.