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1. 发明授权

US5763876A Inlet heating device for ion mobility spectrometer 失效
标题翻译：离子迁移谱仪入口加热装置
公开(公告)号：US5763876A
公开(公告)日：1998-06-09
申请号：US627584
申请日：1996-04-04
申请人： John Michael Alfred Pertinarides , Alexander Semenovich Tarassov , Byron Lee Carnahan , Charles W. Pipich , Viktor Kouznetsov
发明人： John Michael Alfred Pertinarides , Alexander Semenovich Tarassov , Byron Lee Carnahan , Charles W. Pipich , Viktor Kouznetsov
IPC分类号： G01N27/64 , B01D59/44 , H01J49/00
CPC分类号： G01N27/622
摘要： Generally, the present invention provides a device for heating the sample stream inlet of an ion mobility spectrometry (IMS) sensor. The heating device increases the temperature of the sample stream inlet surface to reduce the amount of time between adsorption and desorption taking place on the surface. This greatly improves the ability of the IMS sensor to follow rapidly changing analyte concentration levels. An alternate preferred embodiment of the present invention provides a flow smoothing device for decreasing the turbulence present in the fluid flow entering the IMS sensor's carrier stream inlet. This flow smoothing insert permits increasing the fluid flow rate entering the IMS sensor's carrier stream inlet to levels which maximize the IMS sensor's measurement sensitivity without causing mixing of the sample and carrier fluid stream flows.
摘要翻译：通常，本发明提供了用于加热离子迁移谱（IMS）传感器的样品流入口的装置。加热装置增加了样品流入口表面的温度，以减少在表面上发生的吸附和解吸时间。这大大提高了IMS传感器跟随快速变化的分析物浓度水平的能力。本发明的替代优选实施例提供一种用于减少流入IMS传感器的载体流入口的流体流中存在的湍流的流动平滑装置。这种流动平滑插入件允许将进入IMS传感器的载体流入口的流体流速增加到使得传感器的测量灵敏度最大化的水平，而不引起样品和载体流体流的混合。

2. 发明授权

US5723861A Recirculating filtration system for use with a transportable ion mobility spectrometer 失效
公开(公告)号：US5723861A
公开(公告)日：1998-03-03
申请号：US628147
申请日：1996-04-04
申请人： Byron Lee Carnahan , Alexander Semenovich Tarassov
发明人： Byron Lee Carnahan , Alexander Semenovich Tarassov
IPC分类号： G01N27/64 , H01J49/40 , H01J49/04
CPC分类号： G01N27/622
摘要： Generally, the present invention provides a recirculating filtration system for use with a transportable ion mobility spectrometer. One preferred embodiment of the transportable recirculating filtration system comprises a pump connected with a set of filters and flow sensors to an ion mobility spectrometry (IMS) sensor. The IMS sensor's outlet flow is cleaned by the filters and recirculated by the pump back into the IMS sensor as the carrier fluid stream flow. A portion of the IMS sensor's outlet flow equal to the amount of flow introduced into the sensor is exhausted from the filtration system to maintain a constant total flow volume through the system as the sample is being taken. An alternate preferred embodiment of the present invention provides a transportable recirculating filtration system for measuring an unknown concentration of a selected ionizable contaminant substance such as benzene present in a sample fluid stream in which other substances may coexist. The filtration system of the alternate preferred embodiment comprises a pump connected with a set of filters, flow sensors, and a plurality of valves to a device for introducing a controlled concentration of the selected ionizable contaminant into an ion mobility spectrometry (IMS) sensor. The unknown concentration is calculated using the Standard Addition Method. The alternate preferred embodiment of the present invention also provides a recirculating filtration system which can be used to calibrate the IMS sensor by establishing which ionogram structures result from the presence of a particular analyte in the sample stream. A known concentration of an analyte is introduced into the sample stream. The resulting ionogram is compared to an ionogram recorded with no contaminants present. By comparing these spectra, a correlation can be made between the positions of features in the ionogram and the analyte which gives rise to these features.

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