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Application of principal component analysis to gas sensing characteristics of Cr0.8Fe0.2NbO4 thick film array

Murthy, Sree Rama A and Pathak, Dhruv and Sharma, Gautam and Gnanasekar, KI and Jayaraman, V and Umarji, AM and Gnanasekaran, T (2015) Application of principal component analysis to gas sensing characteristics of Cr0.8Fe0.2NbO4 thick film array. In: ANALYTICA CHIMICA ACTA, 892 . pp. 175-182.

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Official URL: http://dx.doi.org/10.1016/j.aca.2015.08.034

Abstract

The transient changes in resistances of Cr0.8Fe0.2NbO4 thick film sensors towards specified concentrations of H-2, NH3, acetonitrile, acetone, alcohol, cyclohexane and petroleum gas at different operating temperatures were recorded. The analyte-specific characteristics such as slopes of the response and retrace curves, area under the curve and sensitivity deduced from the transient curve of the respective analyte gas have been used to construct a data matrix. Principal component analysis (PCA) was applied to this data and the score plot was obtained. Distinguishing one reducing gas from the other is demonstrated based on this approach, which otherwise is not possible by measuring relative changes in conductivity. This methodology is extended for three Cr0.8Fe0.2NbO4 thick film sensor array operated at different temperatures. (C) 2015 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Keywords: Cr0.8Fe0.2NbO4 thick film; Gas sensors; Principal component analysis; Sensor array
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Id for Latest eprints
Date Deposited: 30 Oct 2015 07:21
Last Modified: 30 Oct 2015 07:21
URI: http://eprints.iisc.ac.in/id/eprint/52604

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