ION MOBILITY SPECTROMETRY
ION MOBILITY SPECTROMETRY
复制标题
DOI：
10.1021/ac00222a001
复制
发表时间：
1990-01-01
影响因子：
7.4
通讯作者：
MCMINN D G
中科院分区：
文献类型：
--
作者：
HILL H H JR;SIEMS W F;MCMINN D G
当大气压下的气态离子被置于恒定电场中时，它会沿着电场加速，直到与中性分子碰撞，然后再次加速，直到再次碰撞，依此类推。这种分子水平上的加速和碰撞的混沌序列转化为宏观距离上恒定的离子速度。离子速度与电场强度之比称为离子淌度，根据淌度差异分离离子称为离子淌度谱分析 (IMS)。由于 IMS 可以测量低于 10-12 A 的离子电流，因此它作为一种检测技术具有很高的灵敏度。中等分离能力与痕量级灵敏度的结合导致离子迁移谱仪作为独立监测器和色谱检测器的应用。当它作为分析工具出现时
When a gaseous ion at atmospheric pressure is placed in a constant electric field, it accelerates downthe field until it collides with a neutral molecule, ac-celerates again until it has another col-lision, and so forth. This chaotic se-quence of accelerations and collisions at the molecular level translates into a constant ion velocity over macroscopic distances. The ratio of the ion velocity to the magnitude of the electric field is called the ion mobility, and separation of ions on the basis of mobility differ-ences is called ion mobility spectrome-try (IMS). Because it can measure ion currents below 10-12 A, IMS is highly sensitive as a detection technique. The combination of moderate separating power with trace-level sensitivity has led to applications of the ion mobility spectrometer as a stand-alone monitor and a chromatographic detector. When it emerged as an analytical