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Rapid Commun Mass Spectrom

Title:		A coaxially heated membrane introduction mass spectrometry interface for the rapid and sensitive on-line measurement of volatile and semi-volatile organic contaminants in air and water at parts-per-trillion levels
Author(s):		Thompson AJ; Creba AS; Ferguson RM; Krogh ET; Gill CG;
Address:		"Applied Environmental Research Laboratories, Department of Chemistry, Malaspina University-College, 900 Fifth Street, Nanaimo, British Columbia, Canada, V9R 5S5"
Journal Title:		Rapid Commun Mass Spectrom
Year:		2006
Volume:		20
Issue:		13
Page Number:		2000 - 2008
DOI:		10.1002/rcm.2551
ISSN/ISBN:		0951-4198 (Print) 0951-4198 (Linking)
Abstract:		"A coaxially heated membrane introduction mass spectrometry (MIMS) sampling interface is presented that demonstrates improved on-line performance for the direct measurement of semi-volatile organic compounds (SVOCs) in air and water samples at parts-per-trillion levels. The device is based on a polydimethylsiloxane (PDMS) capillary hollow fibre membrane (HFM) in a pneumatically assisted 'flow-over' configuration that is resistively heated on the membrane interior via a coaxial nichrome wire, establishing a thermal gradient counter to the analyte concentration gradient. This arrangement allows for continuous and/or pulsed heating modes, affording excellent sensitivity for the on-line measurement of SVOCs while retaining sensitivity for volatile organic compounds (VOCs). In addition, the signal response time for SVOCs is reduced substantially over conventional 'flow-over' MIMS interfaces. Separation and quantitation of analytes are achieved using quadrupole ion trap tandem mass spectrometry"
Keywords:
Notes:		"PubMed-not-MEDLINEThompson, Alexander J Creba, A Skye Ferguson, Robyn M Krogh, Erik T Gill, Christopher G eng England 2006/06/14 Rapid Commun Mass Spectrom. 2006; 20(13):2000-8. doi: 10.1002/rcm.2551"