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Multistage open-tube trap for enrichment of part-per-trillion trace components of low-pressure (below 27-kPa) air samplesA multistage open-tube trap for cryogenic collection of trace components in low-pressure air samples is described. The open-tube design allows higher volumetric flow rates than densely packed glass-bead traps commonly reported and is suitable for air samples at pressures below 27 kPa with liquid nitrogen as the cryogen. Gas blends containing 200 to 2500 parts per trillion by volume each of ethane and ethene were sampled and hydrocarbons were enriched with 100 + or - 4 percent trap efficiency. The multistage design is more efficient than equal-length open-tube traps under the conditions of the measurements.
Document ID
19860055927
Document Type
Reprint (Version printed in journal)
Authors
Ohara, D. (San Jose State University Foundation, CA, United States)
Vo, T. (Foothill-DeAnza Community College Cupertino, CA, United States)
Vedder, J. F. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1985
Publication Information
Publication: Journal of Chromatographic Science
Volume: 23
ISSN: 0021-9665
Subject Category
INSTRUMENTATION AND PHOTOGRAPHY
Distribution Limits
Public
Copyright
Other