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Yakovlev, P. V.; Shaposhnik, A. V.; Voishchev, V. S.; Котов, В. В.; Ryabtsev, S. V.

doi:10.1023/a:1014412919822

Cited by 4 publications

(2 citation statements)

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“…To improve the selectivity of metal oxide semiconductor gas sensors, it is possible to use the following approaches:additives that increase the sensitivity to target gases [1];selective gas permeable membranes [2];systems that include many sensors that differ in cross-sensitivity to different gases (“electronic nose”) [3];temperature modulation of the MOX sensor.…”

Section: Introductionmentioning

confidence: 99%

Selective Detection of Hydrogen Sulfide and Methane by a Single MOX-Sensor

Shaposhnik

Moskalev

Sizask

et al. 2019

Sensors

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In this paper, we describe a technique for the qualitative and quantitative analysis of such gas mixtures as “hydrogen sulfide in air” and “methane in air” using temperature modulation of a single metal oxide sensor. Using regression analysis in the principal components plane (PC1, PC2), we performed a selective determination of analytes on the minimum set of their concentrations in the training set, which is essential for solving practical problems. An important feature of this work is the difference in test gas concentrations from their concentrations in the training set. For the qualitative analysis of gas mixtures in a wide range of concentrations, we have developed an improved method for processing arrays of multidimensional data. For this improvement, we form a Mahalanobis neighborhood for polynomial regression lines constructed from the projection of training samples for each analyte on the (PC1, PC2) plane. Using the temperature modulation mode for the metal oxide sensor allowed us to increase its response when determining hydrogen sulfide by two to four orders of magnitude compared with the constant temperature mode.

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Section: Introductionmentioning

confidence: 99%

Selective Detection of Hydrogen Sulfide and Methane by a Single MOX-Sensor

Shaposhnik

Moskalev

Sizask

et al. 2019

Sensors

View full text Add to dashboard Cite

show abstract

“…These materials should have both good gas-separating characteristics and high thermal stability, because the working temperature of the sensor surface is usually above 200°ë . Additionally, methods for applying these materials as thin uniform films should be developed [4].…”

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confidence: 99%