Method and apparatus for trace sample collection
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United States of America Patent
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-
Apr 11, 1989
Grant Date -
N/A
app pub date -
Feb 25, 1987
filing date -
Feb 27, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A disposable plastic cartridge contains three fine lightweight wire mesh collectors, each of phosphor bronze. One collector has an oxidized surface for collecting drug particulates. The other two have surfaces electroplated with zinc to form a rough multi-fissured surface for trapping low volatility vapors. In use, a portion of a warm sample air stream is chilled and passed through the collectors in parallel for sample collection. Simultaneously part of the sample air stream by-passes the chiller and is fed directly into a mass analyzer 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.
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