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- E-ISSN 2288-8985
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Development of Portable Preconcentration-Gas Chromatography System for Fast Analysis of Trace Benzene, Toluene and Xylene in Air
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2001, v.14 no.5, pp.432-441
Jung,
Y., &
Kim,
M.
(2001). Development of Portable Preconcentration-Gas Chromatography System for Fast Analysis of Trace Benzene, Toluene and Xylene in Air. Analytical Science and Technology, 14(5), 432-441.
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Abstract
An automated on-line portable preconcentration-short column gas chromatograph was developed, which used preconcentrator using adsorption tube with Tenax-GR and Curie-point heating. The developed system operated with 3 steps of processing, preconcentration, thermal desorption, and analysis and cleaning, and could continued operating within 1~2 min cycle. The recoveries of preconcentrator for toluene was ranged between <TEX>$94.7{\pm}6.6%$</TEX> and <TEX>$103.8{\pm}3.1%$</TEX> with less than 7% of RSD. For benzene, toluene and xylene(BTX) standard gas test, IDL was 41, 49, <TEX>$472ng/m^3$</TEX> benzene, toluene and o-xylene, respectively. The BTX mixture was analyzed within 30 sec with baseline separation by the system equipped with 4 m long capillary column. The deficiency of separation power caused by short column was solved by the control of sample injection volume and inlet/outlet pressure ratio. The automated portable preconcentration-short column gas chromatograph system was found to be useful for the continuous air monitoring of BTX at ppb levels in ambient air.
- keywords
- on-line, portable, preconcentration, gas chromatograph, fast analysis, BTX, ppb levels
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