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J Environ Sci Health A Tox Hazard Subst Environ Eng

Title:		Sampling of BTX in Hat Yai city using cost effective laboratory-built PCB passive sampler
Author(s):		Subba JR; Thammakhet C; Thavarungkul P; Kanatharana P;
Address:		"a Trace Analysis and Biosensor Research Center, Prince of Songkla University , Hat Yai , Thailand. b Department of Chemistry , Faculty of Science, Prince of Songkla University , Hat Yai , Thailand. c Department of Physics , Faculty of Science, Prince of Songkla University , Hat Yai , Thailand"
Journal Title:		J Environ Sci Health A Tox Hazard Subst Environ Eng
Year:		2016
Volume:		20160526
Issue:		10
Page Number:		861 - 869
DOI:		10.1080/10934529.2016.1181464
ISSN/ISBN:		1532-4117 (Electronic) 1093-4529 (Linking)
Abstract:		"A laboratory-built printed circuit board (PCB) passive sampler used for the monitoring of xylene and styrene in copy print shops was re-validated for detecting benzene, toluene and xylene (BTX) and applied for the sampling of ambient air from Hat Yai city, Songkhla, Thailand, in the month of November 2014. For monitoring, the PCB passive samplers were exposed to target analytes in 16 locations covering high to low exposure areas. After sampling, the samplers were thermally desorbed and the analytes were trapped by multi-walled carbon nanotubes packed into a micro-preconcentrator coupled to a gas chromatograph (GC) equipped with a flame ionization detector. At the optimum GC operating conditions, the linear dynamic ranges for BTX were 0.06-5.6 microg for benzene, 0.07-2.2 microg for toluene and 0.23-2.5 microg for xylene with R(2) > 0.99 with the limits of detection being 6.6, 6.8 and 19 ng for benzene, toluene and xylene, respectively. The concentrations of BTX in the 16 sampling sites were in the range of N.D.-1.3 +/- 1.6, 4.50 +/- 0.76-49.6 +/- 3.7 and 1.00 +/- 0.21-39.6 +/- 3.1 microg m(-3), respectively. When compared to past studies, there had been an increase in the benzene concentration"
Keywords:		"Air Pollutants/*analysis Benzene/*analysis Chromatography, Gas Cities Environmental Monitoring/*methods Nanotubes, Carbon Thailand Toluene/*analysis Xylenes/*analysis Btx Pcb passive sampler polypyrrole silver particles volatile organic compounds;"
Notes:		"MedlineSubba, Jas Raj Thammakhet, Chongdee Thavarungkul, Panote Kanatharana, Proespichaya eng England 2016/05/28 J Environ Sci Health A Tox Hazard Subst Environ Eng. 2016 Aug 23; 51(10):861-9. doi: 10.1080/10934529.2016.1181464. Epub 2016 May 26"