Abstract
The discriminating capacity of multisensor arrays for gas analysis (an electronic nose) with respect to multicomponent chemical atmospheres containing predominant components can be increased by the spectrally selective illumination of photosensitive sensor coatings. The classification of mixtures with ethanol as a predominant component was studied with the use of an array of three sensors based on piezoelectric quartz resonators modified with hydrogen, copper, and lead phthalocyanine films. Illumination in the red region of the spectrum several times decreased the adsorption capacity of the phthalocyanine films for ethanol. This allowed us to classify the following five analytes: triethylamine, propylamine, ethanol, and ethanol-triethylamine and ethanol-propylamine mixtures. The proposed method also allowed us to improve the reproducibility of the measurement results and to shorten the duration of analysis.
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Original Russian Text © Yu.V. Burlachenko, B.A. Snopok, 2008, published in Zhurnal Analiticheskoi Khimii, 2008, Vol. 63, No. 6, pp. 610–619.
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Burlachenko, Y.V., Snopok, B.A. Multisensor arrays for gas analysis based on photosensitive organic materials: An increase in the discriminating capacity under selective illumination conditions. J Anal Chem 63, 557–565 (2008). https://doi.org/10.1134/S1061934808060087
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DOI: https://doi.org/10.1134/S1061934808060087