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Sensors (Basel)

Title:		A Linear-Quadratic Model for the Quantification of a Mixture of Two Diluted Gases with a Single Metal Oxide Sensor
Author(s):		Madrolle S; Grangeat P; Jutten C;
Address:		"Univ. Grenoble Alpes, CEA, LETI, MINATEC Campus, Micro-technologies for Biology and Healthcare Division, F-38054 Grenoble, France. stephanie.madrolle@cea.fr. Univ. Grenoble Alpes, CEA, LETI, MINATEC Campus, Micro-technologies for Biology and Healthcare Division, F-38054 Grenoble, France. pierre.grangeat@cea.fr. GIPSA-lab, Univ. Grenoble Alpes, CNRS, Grenoble INP, F-38000 Grenoble, France. christian.jutten@gipsa-lab.grenoble-inp.fr"
Journal Title:		Sensors (Basel)
Year:		2018
Volume:		20180601
Issue:		6
Page Number:		-
DOI:		10.3390/s18061785
ISSN/ISBN:		1424-8220 (Electronic) 1424-8220 (Linking)
Abstract:		"The aim of our work is to quantify two gases (acetone and ethanol) diluted in an air buffer using only a single metal oxide (MOX) sensor. We took advantage of the low selectivity of the MOX sensor, exploiting a dual-temperature mode. Working at two temperatures of the MOX sensitive layer allowed us to obtain diversity in the measures. Two virtual sensors were created to characterize our gas mixture. We presented a linear-quadratic mixture sensing model which was closer to the experimental data. To validate this model and the experimental protocol, we inverted the system of quadratic equations to quantify a mixture of the two gases. The linear-quadratic model was compared to the bilinear model proposed in the literature. We presented an experimental evaluation on mixtures made of a few ppm of acetone and ethanol, and we obtained a precision close to the ppm. This is an important step towards medical applications, particularly in terms of diabetes, to deliver a non-invasive measure with a low-cost device"
Keywords:		acetone breath analysis dual temperature mode ethanol gas sensor linear-quadratic model metal-oxide quantification volatile organic compound (VOC);
Notes:		"PubMed-not-MEDLINEMadrolle, Stephanie Grangeat, Pierre Jutten, Christian eng Switzerland 2018/06/06 Sensors (Basel). 2018 Jun 1; 18(6):1785. doi: 10.3390/s18061785"