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is added after preconcentration of the contaminants for dissolving the contaminants, the liquid solution then being withdrawn for injection into the chromatograph.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. (ANL), Argonne, IL (United States)
- 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}
}