Recirculating filtration system for use with a tra

专利名称：Recirculating filtration system for use with a

transportable ion mobility spectrometer ingas chromatography applications

发明人：Robert E. Uber,Viktor Kouznetsov,Alexander

Tarassov,Byron L. Carnahan,Charles W. Pipich

申请号：US08/726843申请日：19961008公开号：US05736739A公开日：19980407

摘要：Generally, the present invention provides a recirculating filtration system foruse with a transportable ion mobility spectrometer in gas chromatography applications.The transportable recirculating filtration system comprises a pump and a set of filtersand flow sensors connected to an ion mobility spectrometry sensor having a gaschromatograph column at its inlet. The IMS sensor's outlet flow is cleaned by the filtersand recirculated by the pump back into the IMS sensor as the carrier fluid stream flow. Aportion of the IMS sensor's outlet flow equal to the amount of flow introduced into thesensor as the sample is exhausted from the filtration system to maintain a constant totalflow volume through the system as the sample is being analyzed. Preferably, themulticapillary column is sealed to a heated transfer line leading to the sample streaminlet of the IMS sensor. The transfer line is preferably maintained at a temperature 10°C.-40° C. above that of the multicapillary column in order to ensure that analyte specieswill not adsorb on the walls of the transfer line instead of entering the sample streaminlet of the IMS sensor. The transfer line can be optionally configured with a flow

smoothing insert to produce a laminar flow profile throughout the volume between thetransfer line outlet end and the IMS sensor housing upon exit of the carrier flow streamfrom the flow smoothing insert.

申请人：MINE SAFETY APPLIANCES COMPANY

代理机构：Titus & McConomy

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