Method and apparatus for trace sample collection

Details Method and apparatus for trace sample collection Method and apparatus for trace sample collection

G - Physics

01

N

73/100

G01N 1/22 (2006.01) G01N 1/24 (2006.01)

Patent

CA 1279207

TITLE: METHOD AND APPARATUS FOR TRACE SAMPLE COLLECTION ABSTRACT OF THE DISCLOSURE A disposable plastic cartridge contains three fine lightweight wire mesh collectors, each of phosphor bronze. One collector has an oxidized surface for col- lecting drug particulates. The other two have surfaces electroplated with zinc to form a rough multi-fissured surface for trapping low volatility vapours. In use, a portion of a warm sample air stream is chilled and passed through the collectors in parallel for sample collec- tion. Simultaneously part of the sample air stream by- passes the chiller and is fed directly into a mass analy- zer for real time analysis. Next, both collection and real time analysis are terminated, and each collector is desorbed in sequence with a pulse of hot air which flows into the mass analyzer for sequential analysis.

502923

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