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Title: Liquid-absorption preconcentrator sampling instrument

Abstract

A system is described for detecting trace concentrations of an analyte in air and includes a preconcentrator for the analyte and an analyte detector. The preconcentrator includes an elongated tubular container in which is disposed a wettable material extending substantially the entire length of the container. One end of the wettable material is continuously wetted with an analyte-sorbing liquid, which flows to the other end of the container. Sample air is flowed through the container in contact with the wetted material for trapping and preconcentrating the traces of analyte in the sorbing liquid, which is then collected at the other end of the container and discharged to the detector. The wetted material may be a wick comprising a bundle of fibers, one end of which is immersed in a reservoir of the analyte-sorbing liquid, or may be a liner disposed on the inner surface of the container, with the sorbing liquid being centrifugally dispersed onto the liner at one end thereof. The container is preferably vertically oriented so that gravity effects the liquid flow. 4 figs.

Inventors:
Issue Date:
OSTI Identifier:
7069132
Patent Number(s):
4977095 A
Application Number:
PPN: US 7-330655
Assignee:
Dept. of Energy, Washington, DC (United States)
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Resource Relation:
Patent File Date: 30 Mar 1989
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AIR SAMPLERS; ADSORBENTS; GAS ANALYSIS; GASES; ADSORPTION; CONCENTRATORS; EQUIPMENT; FLUIDS; SAMPLERS; SORPTION; 400800* - Combustion, Pyrolysis, & High-Temperature Chemistry

Citation Formats

Zaromb, S. Liquid-absorption preconcentrator sampling instrument. United States: N. p., 1990. Web.
Zaromb, S. Liquid-absorption preconcentrator sampling instrument. United States.
Zaromb, S. Tue . "Liquid-absorption preconcentrator sampling instrument". United States.
@article{osti_7069132,
title = {Liquid-absorption preconcentrator sampling instrument},
author = {Zaromb, S},
abstractNote = {A system is described for detecting trace concentrations of an analyte in air and includes a preconcentrator for the analyte and an analyte detector. The preconcentrator includes an elongated tubular container in which is disposed a wettable material extending substantially the entire length of the container. One end of the wettable material is continuously wetted with an analyte-sorbing liquid, which flows to the other end of the container. Sample air is flowed through the container in contact with the wetted material for trapping and preconcentrating the traces of analyte in the sorbing liquid, which is then collected at the other end of the container and discharged to the detector. The wetted material may be a wick comprising a bundle of fibers, one end of which is immersed in a reservoir of the analyte-sorbing liquid, or may be a liner disposed on the inner surface of the container, with the sorbing liquid being centrifugally dispersed onto the liner at one end thereof. The container is preferably vertically oriented so that gravity effects the liquid flow. 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {12}
}