Selectivity enhancement of target volatile organic compounds using sensor array and temperature modulation

Abstract

In this paper, we report the performance of a volatile organic compounds identification system based on a commercial metal-oxide gas sensor array. Analyses of five volatile organic compounds (heptane, pentane, isooctane, isopropyl alcohol, and tetrachloroethylene) Have been performed with these unselective sensors. The device consists of three MOX commercial sensors (ASMLN, AS-MLK, AS-MLC), The behavior of these sensors was measured at different ranges of temperature. Principal component analysis (PCA) was applied in order to identify the target gases. We obtained a high classification of the five VOCs by temperature modulation. The final aim of this research is to improve the selectivity of commercial sensors based on metal oxide to classify different VOCs.