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Title: Mass transfer resistance in a liquid-phase microextraction employing a single hollow fiber under unsteady-state conditions
Authors: Kumric, Ksenija R.
Vladisavljevic, Goran T.
Dordevic, Jelena S.
Jonsson, Jan Ake
Trtic-Petrovic, Tatjana M.
Keywords: Hollow fibre liquid-phase microextraction
Mass transfer coefficient
Mass transfer resistance
Issue Date: 2012
Publisher: © WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Citation: KUMRIC, K.R. ... et al, 2012. Mass transfer resistance in a liquid-phase microextraction employing a single hollow fiber under unsteady-state conditions. Journal of Separation Science, 35(18), pp.2390-2398.
Abstract: In this study, the mass transport resistance in liquid-phase microextraction (LPME) in a single hollow fiber was investigated. A mathematical model has been developed for the determination of the overall mass transfer coefficient based on the acceptor phase in an unsteady state. The overall mass transfer coefficient in LPME in a single hollow fiber has been estimated from time-dependent concentration of extracted analyte in the acceptor phase while maintaining a constant analyte concentration in the donor phase. It can be achieved either using a high volume of donor to acceptor phase ratio or tuning the extraction conditions to obtain a low-enrichment factor, so that the analyte concentration in the sample is not significantly influenced by the mass transfer. Two extraction systems have been used to test experimentally the developedmodel: the extraction of Lu(III) from a buffer solution and the extraction of three local anesthetics from a buffer or plasma solution. The mass transfer resistance, defined as a reciprocal values of the mass transfer coefficient, was found to be 1.2 × 103 cm−1 min for Lu(III) under optimal conditions and from 1.96 to 3.3 × 103 cm−1 min for the local anesthetics depending on the acceptor pH and the hydrophobicity of the drug.
Description: This article is closed access. It was published in the Journal of Separation Science: http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1615-9314
Version: Closed access
DOI: 10.1002/jssc.201200497
URI: https://dspace.lboro.ac.uk/2134/10547
Publisher Link: http://www.jss-journal.com
http://dx.doi.org/10.1002/jssc.201200497
ISSN: 1615-9306
Appears in Collections:Closed Access (Chemical Engineering)

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