Vapor sensing instrument for ultra trace chemical detection

A detector for detecting vapors emitted from analytes includes a housing, a pump and a sensing assembly. The housing has an inlet, an outlet and an enclosed sensing volume therebetween. The pump communicates with the housing for moving a carrier sequentially through the enclosed sensing volume at a...

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Bibliographische Detailangaben
Hauptverfasser: Aker, Craig A, Cumming, Colin J, Fisher, Mark E, Fox, Michael J, laGrone, Marcus J, Reust, Dennis K, Rockley, Mark G, Towers, Eric S
Format: Patent
Sprache:eng
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Zusammenfassung:A detector for detecting vapors emitted from analytes includes a housing, a pump and a sensing assembly. The housing has an inlet, an outlet and an enclosed sensing volume therebetween. The pump communicates with the housing for moving a carrier sequentially through the enclosed sensing volume at a predetermined flow rate. The sensing assembly senses the vapors of the analyte delivered by the carrier as the carrier passes through the housing. The sensing assembly includes a sensing unit constructed of an amplifying fluorescent polymer, a source of excitation, a detector, and a convertor assembly.