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J Hazard Mater

Title:		Solvent vapour monitoring in work space by solid phase micro extraction
Author(s):		Li K; Santilli A; Goldthorp M; Whiticar S; Lambert P; Fingas M;
Address:		"Emergencies Science Division, Environment Canada, Environmental Technology Centre, River Road, Ottawa, Ont., Canada K1A OH3. li.ken@etc.ec.gc.ca"
Journal Title:		J Hazard Mater
Year:		2001
Volume:		83
Issue:		1-Feb
Page Number:		83 - 91
DOI:		10.1016/s0304-3894(00)00329-0
ISSN/ISBN:		0304-3894 (Print) 0304-3894 (Linking)
Abstract:		"Solid phase micro extraction (SPME) is a fast, solvent-less alternative to conventional charcoal tube sampling/carbon disulfide extraction for volatile organic compounds (VOC). In this work, SPME was compared to the active sampling technique in a typical lab atmosphere. Two different types of fibre coatings were evaluated for solvent vapour at ambient concentration. A general purpose 100 microm film polydimethylsiloxane (PDMS) fibre was found to be unsuitable for VOC work, despite the thick coating. The mixed-phase carboxen/PDMS fibre was found to be suitable. Sensitivity of the SPME was far greater than charcoal sorbent tube method. Calibration studies using typical solvent such as dichloromethane (DCM), benzene (B) and toluene (T) showed an optimal exposure time of 5 min, with a repeatability of less than 20% for a broad spectrum of organic vapour. Minimum detectable amount for DCM is in the range of 0.01 microg/l (0.003 ppmv). Variation among different fibres was generally within 30% at a vapour concentration of 1 microg DCM/l, which was more than adequate for field monitoring purpose. Adsorption characteristics and calibration procedures were studied. An actual application of SPME was carried out to measure background level of solvent vapour at a bench where DCM was used extensively. Agreement between the SPME and the charcoal sampling method was generally within a factor of two. No DCM concentration was found to be above the regulatory limit of 50 ppmv"
Keywords:		Adsorption Air Pollutants/*analysis Carbon Carbon Fiber Charcoal Dimethylpolysiloxanes Environmental Monitoring/*instrumentation Nylons Sensitivity and Specificity Solvents/*analysis Volatilization;
Notes:		"MedlineLi, K Santilli, A Goldthorp, M Whiticar, S Lambert, P Fingas, M eng Comparative Study Netherlands 2001/03/27 J Hazard Mater. 2001 May 7; 83(1-2):83-91. doi: 10.1016/s0304-3894(00)00329-0"