| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technology capable of separating ion to be detected in a gas phase of atmospheric pressure or near it with a simple configuration and introducing it efficiently into a mass spectrometer or ion detector on a post stage, for improved detection precision at an apparatus on post stage. <P>SOLUTION: An hour glass type flow channel, whose cross sectional area gradually decreases and then gradually increases, is configured along the flow direction of the gas containing ion. A potential difference is provided between an electrode arranged at the upper part of the hour glass and the inner wall of the hour glass flow channel as well as between the inner wall of the hour glass flow channel and the electrode arranged at the lower part of the hour glass. Accordingly, the ion having the ion mobility of a predetermined range is converged into the central part of a flow channel for transmission, while the ion having the ion mobility beyond the predetermined range is caused to advance toward the flow channel inner wall for discharge to the outside of the system. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
