‘Electronic noses’: Towards the objective instrumental characterization of food aroma

Mielle, Patrick

doi:10.1016/s0924-2244(96)10045-5

Cited by 112 publications

(70 citation statements)

References 11 publications

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“…These metal oxides (mostly SnO2, Ga2O3 and TiO2) can also be doped with metals such as Cu (Zhang and Liu 2000), Pt plus Nb (Comini et al 2000) and Sb, Bi, Fe, Au, Cd (Morimitsu et al 2000), or metal oxides of Co, Cr, La, Ce (Fukui and Katsuki 2000), Mg, Al , Ru, Rh and Ir (Lang et al 2000) among others. These doping metals help to diminish the humidity and temperature dependence (Fukui and Katsuki 2000;Morimitsu et al 2000), and to improve the sensitivity and the selectivity (Comini et al 2000;Mielle 1996). …”

Section: Metal Oxide Semiconductor Sensors (Mos)mentioning

confidence: 99%

“…A thin film of polymer is deposited onto a sensing substrate formed by two parallel platinum or gold plated electrodes with a insulating base such as oxidized silicon (Partridge et al 1996). The most common polymers used in the synthesis of CPs are polypyrroles, polyanilines, polytiophenes, butane to decane sulphonic acids, para-toluenesulphonic acid and its tetra-ethylammonium salt, sodium monohydrogenosulphate and tetraethylammonium tetrafluoroborate (Mielle 1996) although new polymers are being synthesized to open these sensors to new applications. Thus, polymers with a conjugated bonding system are being now used due to the excellent electrical characteristics of these materials for microelectronic device manufacturing .…”

Section: Conducting Polymer Sensorsmentioning

confidence: 99%

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Sensors: From biosensors to the electronic nose

García‐González

Aparicio

2002

Grasas y Aceites

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Section: Metal Oxide Semiconductor Sensors (Mos)mentioning

confidence: 99%

Section: Conducting Polymer Sensorsmentioning

confidence: 99%

Sensors: From biosensors to the electronic nose

García‐González

Aparicio

2002

Grasas y Aceites

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“…Le nez électronique est un instrument constitué d'un ensemble de capteurs sensibles à la présence de molécules volatiles spécifiques et d'un système de traitement des signaux résultants capable de comparer à l'aide de méthodes statistiques les profils obtenus à ceux produits par des échantillons de même nature [4][5][6][7][8]. Il s'agit donc de générer les odeurs dans des conditions réalistes et reproductibles, une partie des substances volatiles étant ensuite entraînée par un gaz inerte sur la barrette de capteurs.…”

Section: Nez éLectroniqueunclassified

Evaluation de la neutralité organoleptique des huiles raffinées à l’aide d’un nez électronique

Vigneron¹,

Vanhemelrijck²,

Stoclin³

et al. 2002

OCL

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Résumé :Aucune technique analytique ne permet d'évaluer en contrôle industriel si une huile raffinée est de goût neutre c'est à dire dépourvue d'un goût spécifique. La détermination des composés volatils totaux par chromatographie en phase gazeuse de l'espace de tête ne parvient pas à répondre à ce problème puisque cette technique bien que rapide donne des résultats qui ne sont pas corrélés avec la note globale donnée par un panel de dégustation. Les nez électroniques équipés de semi-conducteurs donnent des résultats encourageants dans le cas des huiles de tournesol mais les capteurs actuellement disponibles sont insensibles aux flaveurs de certaines huiles comme les huiles de colza. Quoique de tels équipements ne puissent remplacer à ce jour l'évaluation sensorielle, ils peuvent être un contrôle complémentaire intéressant pour alléger le Contrôle Qualité quotidien d'une production d'huile raffinée. Summary :No standard analytical techniques are efficient enough to evaluate the bland taste of refined oils in quality control. The determination of total volatile compounds by gas liquid chromatography fails to reach this objective because there is no correlation between the amount and the average score of the taste panel. Electronic noses equipped with metal oxide sensors give promising results mainly for sunflower oils. Although such equipments cannot replace flavor panel evaluation at present time, they could be a very useful tool for the quality control of a daily production of refined oils Mots-clés : évaluation organoleptique, neutralité de goût des huiles raffinées, détermination des composés volatils, nez électronique, capteurs à oxyde métallique.

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“…A priori, nothing indicates that the dynamic phase or the shape do not contain relevant information for the discrimination of the products. One particular approach, to take into account the entire curves, consists in decomposing the curves into a certain number of discontinuous values [8]. The drawback of this method is that it requires a large number of variables to define each sample.…”

Section: Introductionmentioning

confidence: 99%

Trace voltammetric measurements of cancerostatic actinomycin-C1

Ibrahim

Temerk

1998

Analusis

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Abstract. This article describes how Analysis of Variance may be used to select those regions of the curves generated by a gas sensor ar ray which contain the most discriminant information for a particular application. The Analysis of Variance is performed on each point of the signals generated by the sensor array for a particular set of samples. The Group Variances and the Residual Variances are plotted as functions of their position in the signal. Regions of the signals that vary systematically from one group of samples to another will have high Group Variance values and low and randomly distributed Residual Variance values. This method has shown for a particular set of products for cats analysed with a thirty two polymer sensor array, that the most discriminant information is located at the end of the curves. It has also shown an absence of discrimination between standard and tainted pig fat samples with this sensor array. The ad vantage of this method is that it can be used on almost any sort of raw signal as a pre-analysis step in order to know whether it is worthwhile going on to more fastidious and time consuming signal analysis procedures.

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‘Electronic noses’: Towards the objective instrumental characterization of food aroma

Cited by 112 publications

References 11 publications

Sensors: From biosensors to the electronic nose

Sensors: From biosensors to the electronic nose

Evaluation de la neutralité organoleptique des huiles raffinées à l’aide d’un nez électronique

Trace voltammetric measurements of cancerostatic actinomycin-C1

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