OrangerV1, France, Analysis, bibRecord, 000191

Solid phase microextraction (SPME) of orange juice flavor: Odor representativeness by direct gas chromatography olfactometry (D-GC-O)

Identifieur interne : 000191 ( France/Analysis ); précédent : 000190; suivant : 000192

Solid phase microextraction (SPME) of orange juice flavor: Odor representativeness by direct gas chromatography olfactometry (D-GC-O)

Auteurs : Barbara Rega [France] ; Nicole Fournier [France] ; Elisabeth Guichard [France]

Source :

Journal of agricultural and food chemistry : (Print) [ 0021-8561 ] ; 2003.

RBID : Pascal:04-0103099

Descripteurs français

Pascal (Inist)
- Microextraction phase solide, Procédé extraction, Jus d'orange, Flaveur, Arôme, Méthode directe, Olfactométrie, Chromatographie phase gazeuse, Citrus sinensis.

English descriptors

KwdEn :
- Aroma, Beverages (analysis), Chromatography, Gas (methods), Citrus sinensis, Citrus sinensis (chemistry), Direct method, Extraction process, Flavor, Fruit (chemistry), Gas Chromatography-Mass Spectrometry, Gas chromatography, Humans, Odors (analysis), Olfactometry, Orange juice, Smell, Solid phase microextraction.
MESH :
- analysis : Beverages, Odors.
- chemistry : Citrus sinensis, Fruit.
- methods : Chromatography, Gas.
- Gas Chromatography-Mass Spectrometry, Humans, Smell.

Abstract

The sensorial quality of solid phase microextraction (SPME) flavor extracts from orange juice was measured by direct gas chromatogrphy-0lfactometry (D-GC-O), a novel instrumental tool for evaluating odors from headspace extracts. In general, odor impressions emerging from SPME extracts poorly resembled that of the original orange juice. In an attempt to improve the sensorial quality of extracts, sample equilibration and exposure times were varied on Carboxen/polydimethylsiloxane (CAR/PDMS) and divinylbenzene/Carboxen/polydimethylsiloxane (DVB/CAR/PDMS) SPME fibers. Best sensorial results were obtained with the DVB/CAR/PDMS fiber exposed for the shortest time; a trained panel of eight assessors judged its odor as the most representative of the reference orange juice. The analysis of odor active compounds by classical GC-O accounted for odor characteristics revealed by D-GC-O. A principal component analysis (PCA) was applied on SPME and headspace extracts using flavor recoveries as variables. Interestingly, PCA discriminated samples according to their odor representations described by D-GC-O analysis. This paper provides the first comprehensive methodology to "smell" SPME extracts and "evaluate" their sensorial quality. This method will enable future investigations to further improve SPME performance.

Affiliations:

Links to Exploration step

Pascal:04-0103099

Le document en format XML

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<front><div type="abstract" xml:lang="en">The sensorial quality of solid phase microextraction (SPME) flavor extracts from orange juice was measured by direct gas chromatogrphy-0lfactometry (D-GC-O), a novel instrumental tool for evaluating odors from headspace extracts. In general, odor impressions emerging from SPME extracts poorly resembled that of the original orange juice. In an attempt to improve the sensorial quality of extracts, sample equilibration and exposure times were varied on Carboxen/polydimethylsiloxane (CAR/PDMS) and divinylbenzene/Carboxen/polydimethylsiloxane (DVB/CAR/PDMS) SPME fibers. Best sensorial results were obtained with the DVB/CAR/PDMS fiber exposed for the shortest time; a trained panel of eight assessors judged its odor as the most representative of the reference orange juice. The analysis of odor active compounds by classical GC-O accounted for odor characteristics revealed by D-GC-O. A principal component analysis (PCA) was applied on SPME and headspace extracts using flavor recoveries as variables. Interestingly, PCA discriminated samples according to their odor representations described by D-GC-O analysis. This paper provides the first comprehensive methodology to "smell" SPME extracts and "evaluate" their sensorial quality. This method will enable future investigations to further improve SPME performance.</div>
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Solid phase microextraction (SPME) of orange juice flavor: Odor representativeness by direct gas chromatography olfactometry (D-GC-O)

Solid phase microextraction (SPME) of orange juice flavor: Odor representativeness by direct gas chromatography olfactometry (D-GC-O)

Source :

Descripteurs français

English descriptors

Abstract

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Links to Exploration step

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