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Title: High-throughput liquid-absorption preconcentrator sampling methods

A system for detecting trace concentrations of an analyte in air includes a preconcentrator for the analyte and an analyte detector. The preconcentrator includes an elongated tubular container comprising a wettable material. The wettable material is continuously wetted with an analyte-sorbing liquid which flows from one part of the container to a lower end. Sampled air flows through the container in contact with the wetted material with a swirling motion which results in efficient transfer of analyte vapors or aerosol particles to the sorbing liquid and preconcentration of traces of analyte in the liquid. The preconcentrated traces of analyte may be either detected within the container or removed therefrom for injection into a separate detection means or for subsequent analysis. 12 figs.
Inventors:
Issue Date:
OSTI Identifier:
7162806
Assignee:
PTO; EDB-94-132987
Patent Number(s):
US 5328851; A
Application Number:
PPN: US 7-993080
Contract Number:
W-31109-ENG-38
Resource Relation:
Patent File Date: 18 Dec 1992
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; AIR SAMPLERS; DESIGN; AEROSOL MONITORING; CHEMICAL ANALYSIS; LIQUIDS; PARTICULATES; SORPTION; SORPTIVE PROPERTIES; VAPORS; AIR POLLUTION MONITORING; EQUIPMENT; FLUIDS; GASES; MONITORING; PARTICLES; SAMPLERS; SURFACE PROPERTIES; 540120* - Environment, Atmospheric- Chemicals Monitoring & Transport- (1990-)