Comparisons of volatile organic compound monitors equipped with cryogenic preconcentrators

Journal Article · Tue Oct 01 04:00:00 EDT 1985 · J. Air Pollut. Control Assoc.; (United States)

DOI:https://doi.org/10.1080/00022470.1985.10466005· OSTI ID:6003593

McClenny, W A; Pleil, J D; Oliver, K D; Holdren, M W

The performances of two nominally identical automated monitors for quantifying volatile organic compounds were compared on identical ambient laboratory air samples. The monitors incorporate cryogenic preconcentration subunits specially designed for controlled release of liquid nitrogen to establish a -150/sup 0/C trap temperature. Measured trends in concentration for perchloroethylene, toluene, chloroform, Freon 113, methyl chloroform, and benzene showed good agreement even at sub-ppbv levels during automated overnight runs, although some effects of adsorption were evident. In a second set of runs, concentration results for one system were plotted versus those for the other. The plots were linear and precise, but slightly biased. Qualitative comparisons using diluted automobile exhaust are also shown.

• Research Organization: Environmental Protection Agency, Research Triangle Park, NC
• OSTI ID: 6003593
• Journal Information: J. Air Pollut. Control Assoc.; (United States), Journal Name: J. Air Pollut. Control Assoc.; (United States) Vol. 35:10; ISSN JPCAA
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION MONITORING
ALKYLATED AROMATICS
AROMATICS
BENZENE
CHLORINATED ALIPHATIC HYDROCARBONS
CHLOROFORM
COMPARATIVE EVALUATIONS
EQUIPMENT
FREONS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
LABORATORY EQUIPMENT
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PERFORMANCE TESTING
SAMPLERS
SAMPLING
TESTING
TOLUENE