%0 Journal Article
%T Vapor Trace Recognition Using a Single Nonspecific Chemiresistor
%A Vladimir Dobrokhotov
%A Alexander Larin
%A Dewayne Sowell
%J Sensors
%D 2013
%I MDPI AG
%R 10.3390/s130709016
%X An application of spectral analysis to the transient response signals of ALD-fabricated conductometric sensors (chemiresistors) upon exposure to short vapor pulses is discussed. It is based on the representation of a response curve in the frequency domain, followed by the multi-dimensional Quadratic Discriminant Analysis (QDA) for analyte identification. Compared to the standard steady-state amplitude analysis, this technique does not depend on a short-term sensor drift, does not have limitations for the number of extracted features and has a strict physical validation. Effective recognition of some relatively simple combustible analytes (acetone, toluene, ethanol) was demonstrated using a single nonspecific chemiresistor.
%K sensor
%K electronic nose
%K pattern recognition
%K transient response
%K LDA
%K QDA
%U http://www.mdpi.com/1424-8220/13/7/9016