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Solid phase microextraction (SPME) of orange juice flavor: odor representativeness by direct gas chromatography olfactometry (D-GC-O).
J Agric Food Chem. 2003 Nov 19; 51(24):7092-9.JA

Abstract

The sensorial quality of solid phase microextraction (SPME) flavor extracts from orange juice was measured by direct gas chromatogrphy-olfactometry (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.

Authors+Show Affiliations

Institut National de la Recherche Agronomique, Unité Mixte de Recherche sur les Arômes (UMR Arômes), 17 rue Sully, B.P. 86510, 21065 Dijon, France.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

14611177

Citation

Rega, Barbara, et al. "Solid Phase Microextraction (SPME) of Orange Juice Flavor: Odor Representativeness By Direct Gas Chromatography Olfactometry (D-GC-O)." Journal of Agricultural and Food Chemistry, vol. 51, no. 24, 2003, pp. 7092-9.
Rega B, Fournier N, Guichard E. Solid phase microextraction (SPME) of orange juice flavor: odor representativeness by direct gas chromatography olfactometry (D-GC-O). J Agric Food Chem. 2003;51(24):7092-9.
Rega, B., Fournier, N., & Guichard, E. (2003). Solid phase microextraction (SPME) of orange juice flavor: odor representativeness by direct gas chromatography olfactometry (D-GC-O). Journal of Agricultural and Food Chemistry, 51(24), 7092-9.
Rega B, Fournier N, Guichard E. Solid Phase Microextraction (SPME) of Orange Juice Flavor: Odor Representativeness By Direct Gas Chromatography Olfactometry (D-GC-O). J Agric Food Chem. 2003 Nov 19;51(24):7092-9. PubMed PMID: 14611177.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Solid phase microextraction (SPME) of orange juice flavor: odor representativeness by direct gas chromatography olfactometry (D-GC-O). AU - Rega,Barbara, AU - Fournier,Nicole, AU - Guichard,Elisabeth, PY - 2003/11/13/pubmed PY - 2004/1/14/medline PY - 2003/11/13/entrez SP - 7092 EP - 9 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 51 IS - 24 N2 - The sensorial quality of solid phase microextraction (SPME) flavor extracts from orange juice was measured by direct gas chromatogrphy-olfactometry (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. SN - 0021-8561 UR - https://www.unboundmedicine.com/medline/citation/14611177/Solid_phase_microextraction__SPME__of_orange_juice_flavor:_odor_representativeness_by_direct_gas_chromatography_olfactometry__D_GC_O__ DB - PRIME DP - Unbound Medicine ER -