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Title: Analytical instrument with apparatus and method for sample concentrating

Abstract

A system for analysis of trace concentrations of contaminants in air includes a portable liquid chromatograph and a preconcentrator for the contaminants to be analyzed. The preconcentrator includes a sample bag having an inlet valve and an outlet valve for collecting an air sample. When the sample is collected the sample bag is connected in series with a sorbing apparatus in a recirculation loop. The sorbing apparatus has an inner gas-permeable container containing a sorbent material and an outer gas-impermeable container. The sample is circulated through the outer container and around the inner container for trapping and preconcentrating the contaminants in the sorbent material. The sorbent material may be a liquid having the same composition as the mobile phase of the chromatograph for direct injection thereinto. Alternatively, the sorbent material may be a porous, solid body, to which mobile phase liquid is added after preconcentration of the contaminants for dissolving the contaminants, the liquid solution then being withdrawn for injection into the chromatograph.

Inventors:
Issue Date:
Research Org.:
Argonne National Lab., IL (USA)
OSTI Identifier:
6624100
Application Number:
ON: DE87007203
Assignee:
Dept. of Energy
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; AIR POLLUTION MONITORS; CHROMATOGRAPHY; PORTABLE EQUIPMENT; AIR; AMINES; HAZARDOUS MATERIALS; SENSITIVITY; TEFLON; EQUIPMENT; FLUIDS; FLUORINATED ALIPHATIC HYDROCARBONS; GASES; HALOGENATED ALIPHATIC HYDROCARBONS; MATERIALS; MEASURING INSTRUMENTS; MONITORS; ORGANIC COMPOUNDS; ORGANIC FLUORINE COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; ORGANIC POLYMERS; PETROCHEMICALS; PETROLEUM PRODUCTS; PLASTICS; POLYETHYLENES; POLYMERS; POLYOLEFINS; POLYTETRAFLUOROETHYLENE; SEPARATION PROCESSES; SYNTHETIC MATERIALS; 440300* - Miscellaneous Instruments- (-1989)

Citation Formats

Zaromb, S. Analytical instrument with apparatus and method for sample concentrating. United States: N. p., 1986. Web.
Zaromb, S. Analytical instrument with apparatus and method for sample concentrating. United States.
Zaromb, S. Mon . "Analytical instrument with apparatus and method for sample concentrating". United States.
@article{osti_6624100,
title = {Analytical instrument with apparatus and method for sample concentrating},
author = {Zaromb, S},
abstractNote = {A system for analysis of trace concentrations of contaminants in air includes a portable liquid chromatograph and a preconcentrator for the contaminants to be analyzed. The preconcentrator includes a sample bag having an inlet valve and an outlet valve for collecting an air sample. When the sample is collected the sample bag is connected in series with a sorbing apparatus in a recirculation loop. The sorbing apparatus has an inner gas-permeable container containing a sorbent material and an outer gas-impermeable container. The sample is circulated through the outer container and around the inner container for trapping and preconcentrating the contaminants in the sorbent material. The sorbent material may be a liquid having the same composition as the mobile phase of the chromatograph for direct injection thereinto. Alternatively, the sorbent material may be a porous, solid body, to which mobile phase liquid is added after preconcentration of the contaminants for dissolving the contaminants, the liquid solution then being withdrawn for injection into the chromatograph.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {8}
}