BTEX compounds identification by means of gas sensors arrays

Abstract

BTEX compounds can cause a threat to environment and human health. For this reason measurement devices are needed for rapid identification of such pollutants. The paper presents the results of recognition of mixtures of benzene, toluene, ethylbenzene and xylenes in humid air by means of two gas sensor arrays and linear discriminant analysis. Measurements were conducted during stabilization/solidification processes of contaminated soils. High classification ratios were obtained for both arrays (I: 88%-94%; II: 94%-96%). Improvement of identification was achieved when two copies of every sensor were included in analysisclassification rates reached 97.1-100%.

Recent Advances in Chemical Sensors for Soil Analysis: A Review

“…In [264], Badura et al have demonstrated the possibility of identifying BTEX-group compounds (i.e., benzene, toluene, ethylbenzene, and xylenes) in contaminated soils using a near real-time monitoring system based on two sensing arrays, each composed of 17 semiconductor Taguchi Gas Sensors (Figaro Engineering Inc., Arlington Heights, IL, USA) and a pattern recognition technique. High classification ratios were obtained for both gas sensor arrays (array I: 88-94%; array II: 94-96% of properly classified samples).…”