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J Chromatogr A

Title:		The use of permeation tube device and the development of empirical formula for accurate permeation rate
Author(s):		Susaya J; Kim KH; Cho JW; Parker D;
Address:		"Department of Environment & Energy, Sejong University, 98 Goon Ja Dong, Seoul 143-747, South Korea"
Journal Title:		J Chromatogr A
Year:		2011
Volume:		20111110
Issue:		52
Page Number:		9328 - 9335
DOI:		10.1016/j.chroma.2011.11.007
ISSN/ISBN:		1873-3778 (Electronic) 0021-9673 (Linking)
Abstract:		"A series of laboratory experiments were conducted to assess the accuracy of permeation tube (PT) devices using a calibration gas generator system to measure permeation rate (PR) of volatile organic compounds (VOCs). Calibration gas standards of benzene, toluene, and m-xylene (BTX) were produced from PTs at varying flow rates (FR) of 20-1200 mL min(-1) and constant temperature (30 degrees C). Results indicate that changes in flow rate greatly affected the permeation rate of each VOC at this temperature. This paper presents experimental approaches to accurately measure actual permeation rate (APR) and the derivation of empirical equations for predicted permeation rate (PPR). If the magnitude of bias is defined as the difference between PPR and the manufacturer's permeation rate (MPR), the bias was typically 19-40% for toluene (T) and 31-54% for m-xylene (X). Benzene (B) exhibited the least bias of 1.4-18.8%, nevertheless our PPR values for benzene were more reliable at lower flow rates (0.75-1.20%). This study highlights the importance of flow rate and associated pressure changes as a key to accurate permeation rate estimation from permeation tube devices"
Keywords:		"Algorithms Benzene/chemistry Chemistry Techniques, Analytical/*instrumentation/methods/standards Equipment Design Gases/analysis Permeability Reference Standards Regression Analysis Reproducibility of Results Toluene/chemistry Volatile Organic Compounds/*;"
Notes:		"MedlineSusaya, Janice Kim, Ki-Hyun Cho, Jin Woo Parker, David eng Research Support, Non-U.S. Gov't Netherlands 2011/12/02 J Chromatogr A. 2011 Dec 30; 1218(52):9328-35. doi: 10.1016/j.chroma.2011.11.007. Epub 2011 Nov 10"