Abstract
The paper presents an application of an electronic nose prototype comprised of six TGS-type sensors and one PID-type sensor to identify odour interaction phenomena in odorous three-component mixtures. The investigation encompassed eight odorous mixtures—toluene-acetone-triethylamine and formaldehyde-butyric acid-pinene—characterized by different odour intensity and hedonic tone. A principal component regression (PCR) calibration model was used for evaluation of predicted odour intensity and hedonic tone. Correctness of identification of odour interactions in the odorous three-component mixtures was determined based on the results obtained with the electronic nose. The results indicated a level of 75–80% for odour intensity and 57–73% for hedonic tone. The average root mean square error of prediction amounted to 0.03–0.06 for odour intensity determination and 0.07–0.34 for hedonic tone evaluation of the odorous three-component mixtures.
Highlights
The capability to identify and discriminate between odorous substances is largely limited to methods and instruments based on the sense of smell
This paper describes an attempt to apply the principal component regression (PCR) method and an electronic nose instrument to determine odour interactions of three-component gas mixtures characterized by different types of odour, which are components of the odorous mixtures typically present in municipal landfills or sewage treatment plants
The paper proposes an application of an electronic nose as an instrumental tool consisting of semiconductor sensors and PID-type sensor to determine if it is possible to observe odour interaction semiconductor sensors and PID-type sensor to determine if it is possible to observe odour phenomena for odorous three-component mixtures
Summary
The capability to identify and discriminate between odorous substances is largely limited to methods and instruments based on the sense of smell. Electronic nose instruments allow holistic analysis of gas mixture compositions without the need to separate and identify of particular components [30,31], they have gained increasing popularity as far as measurement of the gas mixtures with very low concentration levels of their particular components is concerned [32,33]. These devices are characterized by additional advantages as compared to other techniques for odour analysis such as olfactometry or gas chromatography. With all their advantages and certain limitations electronic nose instruments are complementary with respect to the aforementioned odour analysis measurement techniques
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