首页>
外国专利>
Ion mobility spectrometer which controls carrier gas flow to improve detection
Ion mobility spectrometer which controls carrier gas flow to improve detection
展开▼
机译:离子迁移谱仪可控制载气流量以改善检测
展开▼
页面导航
摘要
著录项
相似文献
摘要
IMS apparatus has an inlet with a preconcentrator opening into a reaction region where analyte molecules are ionized and passed via a shutter to a drift region for collection and analysis. A pump and filter arrangement supplies a flushing flow of clean gas to the housing in opposition to ion flow. A pressure pulser connects with the housing and is momentarily switched to cause a short drop in pressure, in the housing to draw in a bolus of analyte sample from the preconcentrator. Just prior to admitting a bolus of sample, the pump is turned off so that the flushing flow drops substantially to zero, thereby prolonging the time the analyte molecules spend in the reaction region.
展开▼