Array of conducting polymer sensors for the characterisation of wines

Guadarrama, A.; Fernández, J.A.; Íñiguez, M; Souto, J.; Saja, J.A. de

doi:10.1016/s0003-2670(00)00769-8

Cited by 65 publications

(43 citation statements)

References 15 publications

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“…The resistance change of the conducting polymer "bridges" is measured as a change in voltage across the sensor at a constant current. Since the 1984 report on the first electronic nose based on polypyrrole, similar conjugated conducting polymer sensor arrays have been constructed for testing and sensing a wide range of mixture systems, including the odor sensing for gases [46,47], recognition of spoilage bacteria and yeasts in milk [48], water quality control [49], identification of fruit cultivar [50], characterization of wines [51,52], and olive oil [53,54].…”

Section: Conducting Polymer "Electronic Noses"mentioning

confidence: 99%

Sensors and sensor arrays based on conjugated polymers and carbon nanotubes

Dai

Soundarrajan

Kim

2002

Pure and Applied Chemistry

187

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Abstract:The need for cheaper, faster, and more accurate measurements has been a driving force for the development of new sensing devices. As is well known, the electrical conductivity of conjugated polymers can be reliably regulated over a wide range through interactions with electron acceptors and donors. This, together with the fast optical dynamics (either in the ground or excited states) of most conjugated polymers, has made conjugated polymers very attractive as transducer-active materials. On the other hand, the unusual electronic, mechanical, and thermal properties of carbon nanotubes have also led to their potential use in a wide range of devices, including sensors. In particular, the ability of carbon nanotubes and their derivatives to operate as gas and glucose sensors has been recently demonstrated. This article provides a status review on the research and development of sensors and sensor arrays based on conjugated polymers and carbon nanotubes. The unique features characteristic of most reported sensing transduction modes related to conjugated polymers and carbon nanotubes are discussed, along with their pros and cons.

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Section: Conducting Polymer "Electronic Noses"mentioning

confidence: 99%

Sensors and sensor arrays based on conjugated polymers and carbon nanotubes

Dai

Soundarrajan

Kim

2002

Pure and Applied Chemistry

187

View full text Add to dashboard Cite

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“…In previous studies, many pieces of sensors were used to obtain much of odorant information, and thus temperature of heaters was in steady state [2][3][4][5][6][7]. In the present study, four odor sensors that were lesser than the previous studies were used.…”

Section: Cepstrum Analysismentioning

confidence: 97%

“…Many researchers used many varieties of sensors that are mounted in a measurement device, and the characteristic of food quality is detected from measured food's odor [2][3][4][5][6][7]. In the studies, the principal component analysis (PCA) and discriminant component analysis (DCA) that detect or separate a specific component from observed information or signals including variable information was used.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Food Freshness and Locality by Odor Sensor

Koike¹,

Shimada²,

Kamimura

et al. 2011

Kansei Engineering International Journal

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Abstract:The aim of this study was to investigate whether food freshness and locality can be classified using a food evaluation system consisting four SnO 2 -semiconductor gas sensors and a solid phase column, into which collecting aroma materials. The temperature of sensors was periodically changed to be in unsteady state and thus, the sensor information was increased. The parameters (in quefrency band) were extracted from sensor information using cepstrum analysis that enable to separate superimposed information on sinusoidal wave. The quefrency was used as parameters for principal component and discriminant analyses (PCA and DCA) to detect food freshness and food localities. We used three kinds of strawberries, people can perceive its odors, passed from one to three days after harvest, and kelps and Ceylon tea, people are hardly to perceive its odor, corrected from five areas as sample. Then, the deterioration of strawberries and localities of kelps and Ceylon teas were visually evaluated using the numerical analyses. While the deteriorations were classified using PCA or DCA, the localities were classified only by DCA. The findings indicate that, although odorant intensity influenced the method detecting food quality, the quefrency obtained from odorant information using cepstrum analysis were available to detect the difference in the freshness and the localities of foods.

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“…Ionic conductivity is affected by proton tunneling induced by hydrogen bond interaction at the backbone and also by ion migration through the polymer. One reported application of ICP employed an array of conducting polymer sensors incorporating 3-Methylthiophene, Aniline and Pyrrole (Guadarrama et al, 2000). The authors evaluated the sensors to different wine varieties and considered the cross sensitivity of the polymeric films to moisture and ethanol.…”

Section: Conductivity Sensors For Chemical Detectionmentioning

confidence: 99%