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公开(公告)号：US6023169A
公开(公告)日：2000-02-08
申请号：US890400
申请日：1997-07-09
摘要： ECD with a non-radioactive electron source for generation of ions in a reaction chamber. The reaction chamber consists of two partial chambers, of which one is evacuated and contains the electron source, and the other contains connections for the feeding in of analysis gas as well as a collector electrode for detecting ions. The partition between the two partial chambers is permeable for electrons from the source but impermeable for gas molecules. The electron source may be a thermoemitter or a photocathode, which is irradiated from the outside through a window. In this way, contact between the analysis substance and the electron source is prevented, which increases measurement stability.
摘要翻译： 具有用于在反应室中产生离子的非放射性电子源的ECD。 反应室由两个部分室组成，其中一个被抽真空并且包含电子源，另一个包含用于分析气体进料的连接以及用于检测离子的集电极。 两个部分室之间的分隔物对于来自源的电子是可渗透的，但是对于气体分子是不可渗透的。 电子源可以是热电偶或光电阴极，其通过窗口从外部照射。 以这种方式，防止分析物质与电子源之间的接触，这增加了测量的稳定性。
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公开(公告)号：US5969349A
公开(公告)日：1999-10-19
申请号：US890399
申请日：1997-07-09
CPC分类号： G01N27/622
摘要： Ion mobility spectrometer with a non-radioactive electron source to generate ions inside a reaction chamber. The reaction chamber consists of two partial chambers, one of which is evacuated and comprises the electron source, and the other one is connected to the drift chamber of the IMS via a shutter grid. The partition wall between both partial chambers is transparent to electrons but impermeable for gas molecules. The electron source may comprise a thermoemitter or a photocathode, which is illuminated from outside through a window. In this way, any contact between analyte and electron source is avoided, thereby improving the measuring stability and enabling operation in positive and negative mode.
摘要翻译： 具有非放射性电子源的离子迁移谱仪在反应室内产生离子。 反应室由两个部分室组成，其中一个被抽真空并且包括电子源，另一个室通过闸板连接到IMS的漂移室。 两个部分室之间的分隔壁对于电子是透明的，但对气体分子是不透气的。 电子源可以包括热电偶或光电阴极，其通过窗口从外部照射。 以这种方式，避免了分析物和电子源之间的任何接触，从而提高了测量的稳定性并使其能够在正和负模式下工作。
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