TY - JOUR
T1 - Continuous monitoring of volatile organic compounds in air emissions using an on-line membrane extraction-microtrap-gas chromatographic system
AU - Mitra, Somenath
AU - Zhu, Naihong
AU - Zhang, Xin
AU - Kebbekus, Barbara
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1996/6/7
Y1 - 1996/6/7
N2 - A method for the continuous monitoring of volatile organic compounds (VOCs) in air using on-line membrane extraction followed by gas chromatographic analysis is presented. The air is passed through one or more hollow-fiber membranes and the VOCs selectively permeate across the membrane into a flow of inert gas such as nitrogen. Before entering the GC column, the VOCs are trapped and concentrated by a microtrap. A concentration pulse of the trapped VOCs is generated by direct electrical heating of the microtrap, which serves as injection for GC separation. Continuous monitoring is done by making injections at fixed intervals of time while the air stream flows continuously through the membrane module.
AB - A method for the continuous monitoring of volatile organic compounds (VOCs) in air using on-line membrane extraction followed by gas chromatographic analysis is presented. The air is passed through one or more hollow-fiber membranes and the VOCs selectively permeate across the membrane into a flow of inert gas such as nitrogen. Before entering the GC column, the VOCs are trapped and concentrated by a microtrap. A concentration pulse of the trapped VOCs is generated by direct electrical heating of the microtrap, which serves as injection for GC separation. Continuous monitoring is done by making injections at fixed intervals of time while the air stream flows continuously through the membrane module.
KW - membrane extraction microtrap
KW - volatile organic compounds
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U2 - 10.1016/0021-9673(95)01374-1
DO - 10.1016/0021-9673(95)01374-1
M3 - Article
AN - SCOPUS:0029941082
SN - 0021-9673
VL - 736
SP - 165
EP - 173
JO - Journal of Chromatography A
JF - Journal of Chromatography A
IS - 1-2
ER -