SYMPOSIA PAPER Published: 01 January 1982
STP33992S

Large Volume Sampling Without Preconcentration for Continuous Gas Chromatography

Source

A milligram quantity of adsorbent material was placed at the head of a gas chromatographic column. The initial part of the column itself served as this adsorbent in some experiments. A continuously flowing gaseous sample was passed through a length of narrow bore metal tubing, the precolumn adsorbent, and the gas chromatographic column. A computer generated signal heated the metal tubing which heated the sample gas stream and the precolumn adsorbent. The changing adsorbent temperature generated a changing concentration of adsorbable substances in the gas stream. Thus, the computer generated a chemical concentration signal usable for chromatographic analysis. This technique is related to chromatographic analysis using preconcentration but has several important advantages.

Author Information

Phillips, JB
Southern Illinois University, Carbondale, Ill.
Valentin, JR
Southern Illinois University, Carbondale, Ill.
Carle, GC
Ames Research Center, Moffett Field, Calif.
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Details
Developed by Committee: D22
Pages: 135–141
DOI: 10.1520/STP33992S
ISBN-EB: 978-0-8031-4848-2
ISBN-13: 978-0-8031-0603-1