Sampling of BTX in Hat Yai city using cost effective laboratory-built PCB passive sampler. Issue 10 (23rd August 2016)

• Record Type: Journal Article
• Authors: Subba, Jas Raj; Thammakhet, Chongdee; Thavarungkul, Panote; Kanatharana, Proespichaya
• Is Part Of: Journal of environmental science and health. Volume 51:Issue 10(2016)
• Page Start: 861
• Page End: 869
• Publication Date: 2016-08-23
• Subjects: BTX -- passive sampler -- PCB -- polypyrrole -- silver particles -- volatile organic compounds; Environmental engineering -- Periodicals; Environmental sciences -- Periodicals; Ecology -- periodicals; Hazardous Substances -- periodicals; 628
• DOI: 10.1080/10934529.2016.1181464
• Languages: English
• ISSNs: 1093-4529

Abstract

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 µ g for benzene, 0.07–2.2 µ g for toluene and 0.23–2.5 µ g 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 µ g m −3, respectively. When compared to past studies, there had been an increase in the benzene concentration.