TY - JOUR
T1 - Simultaneous Extraction and Concentration by On-Line Hollow Fiber Membrane Extraction
AU - Kou, Dawen
AU - Mitra, Somenath
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2003/11/15
Y1 - 2003/11/15
N2 - In the determination of trace-level pollutants in water, a concentration step is usually needed between extraction and analysis. In this paper, simultaneous extraction and concentration during on-line analysis using hollow fiber membranes is reported. Solvent loss across the membrane resulted in simultaneous concentration during extraction and had pronounced influence on enrichment factor and extraction efficiency. This phenomenon is an important consideration for analytical methods employing solvent extraction across a membrane, because it is possible to eliminate the concentration step. Continuous on-line monitoring of semivolatile compounds was achieved using this approach, and the effects of process variables on enrichment and extraction efficiency were studied. It was found that enrichment increased with solvent loss, even when the extraction efficiency decreased.
AB - In the determination of trace-level pollutants in water, a concentration step is usually needed between extraction and analysis. In this paper, simultaneous extraction and concentration during on-line analysis using hollow fiber membranes is reported. Solvent loss across the membrane resulted in simultaneous concentration during extraction and had pronounced influence on enrichment factor and extraction efficiency. This phenomenon is an important consideration for analytical methods employing solvent extraction across a membrane, because it is possible to eliminate the concentration step. Continuous on-line monitoring of semivolatile compounds was achieved using this approach, and the effects of process variables on enrichment and extraction efficiency were studied. It was found that enrichment increased with solvent loss, even when the extraction efficiency decreased.
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U2 - 10.1021/ac030071r
DO - 10.1021/ac030071r
M3 - Article
C2 - 14616022
AN - SCOPUS:0242653687
SN - 0003-2700
VL - 75
SP - 6355
EP - 6360
JO - Analytical Chemistry
JF - Analytical Chemistry
IS - 22
ER -