Polymethoxylated flavones in Brazilian orange juice
Identifieur interne : 003170 ( Main/Exploration ); précédent : 003169; suivant : 003171Polymethoxylated flavones in Brazilian orange juice
Auteurs : A. M. Pupin [Brésil] ; M. J. Dennis [Royaume-Uni] ; M. C. F. Toledo [Brésil]Source :
- Food Chemistry [ 0308-8146 ] ; 1998.
Abstract
Sinensetin has been quantified in authentic samples of Brazilian orange juice. In addition, six further polymethoxylated flavones (PMFs) have been determined in terms of their relative amounts. The PMFs were extracted into toluene and analysed using reversed phase HPLC with detection at 340nm. Peak identification was based on the UV-visible spectra and the elution order described in the literature. Hand-squeezed orange juices contained a mean of 0.10 (SD 0.04) mg−1 sinensetin with the highest concentrations found in Pera and Natal varieties. Commercial samples of frozen concentrated orange juice (FCOJ), frozen concentrated pulp-wash (FCOPW), retail FCOJ and retail freshly squeezed orange juice (FSOJ) typically contained at least ten times more sinensetin than those found for samples squeezed by hand. The PMFs peak area ratios for these sample classes were examined further using canonical discriminant analysis. This procedure could distinguish the hand-squeezed juices of Pera and Hamlin varieties from those of Natal and Valência. Similarly, hand-squeezed juices could be readily distinguished from the commercial samples of FCOJ, FCOPW, retail FCOJ and retail FSOJ.
Url:
DOI: 10.1016/S0308-8146(98)00033-8
Affiliations:
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Pupin</name><affiliation wicri:level="1"><country xml:lang="fr">Brésil</country><wicri:regionArea>Centro Pluridisciplinar de Pesquisas Quı́micas, Biológicas e Agrı́colas (CPQBA), Universidade Estadual de Campinas, CP 6171 Campinas, SP CEP 13081-970</wicri:regionArea><wicri:noRegion>SP CEP 13081-970</wicri:noRegion></affiliation></author><author><name sortKey="Dennis, M J" sort="Dennis, M J" uniqKey="Dennis M" first="M. J." last="Dennis">M. J. Dennis</name><affiliation wicri:level="1"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>CSL Food Science Laboratory, Norwich Research Park, Colney, Norwich NR4 7UQ</wicri:regionArea><wicri:noRegion>Norwich NR4 7UQ</wicri:noRegion></affiliation></author><author><name sortKey="Toledo, M C F" sort="Toledo, M C F" uniqKey="Toledo M" first="M. C. F." last="Toledo">M. C. F. Toledo</name><affiliation wicri:level="1"><country xml:lang="fr">Brésil</country><wicri:regionArea>Faculdade de Engenharia de Alimentos, Universidade Estadual de Campinas, CP 6121, Campinas SP CEP 13081-970</wicri:regionArea><wicri:noRegion>Campinas SP CEP 13081-970</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Food Chemistry</title><title level="j" type="abbrev">FOCH</title><idno type="ISSN">0308-8146</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1998">1998</date><biblScope unit="volume">63</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="513">513</biblScope><biblScope unit="page" to="518">518</biblScope></imprint><idno type="ISSN">0308-8146</idno></series><idno type="istex">7A048ADF7C1C193CCCED50D5453020F95BE445C9</idno><idno type="DOI">10.1016/S0308-8146(98)00033-8</idno><idno type="PII">S0308-8146(98)00033-8</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0308-8146</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Sinensetin has been quantified in authentic samples of Brazilian orange juice. In addition, six further polymethoxylated flavones (PMFs) have been determined in terms of their relative amounts. The PMFs were extracted into toluene and analysed using reversed phase HPLC with detection at 340nm. Peak identification was based on the UV-visible spectra and the elution order described in the literature. Hand-squeezed orange juices contained a mean of 0.10 (SD 0.04) mg−1 sinensetin with the highest concentrations found in Pera and Natal varieties. Commercial samples of frozen concentrated orange juice (FCOJ), frozen concentrated pulp-wash (FCOPW), retail FCOJ and retail freshly squeezed orange juice (FSOJ) typically contained at least ten times more sinensetin than those found for samples squeezed by hand. The PMFs peak area ratios for these sample classes were examined further using canonical discriminant analysis. This procedure could distinguish the hand-squeezed juices of Pera and Hamlin varieties from those of Natal and Valência. Similarly, hand-squeezed juices could be readily distinguished from the commercial samples of FCOJ, FCOPW, retail FCOJ and retail FSOJ.</div></front></TEI><affiliations><list><country><li>Brésil</li><li>Royaume-Uni</li></country></list><tree><country name="Brésil"><noRegion><name sortKey="Pupin, A M" sort="Pupin, A M" uniqKey="Pupin A" first="A. M." last="Pupin">A. M. Pupin</name></noRegion><name sortKey="Toledo, M C F" sort="Toledo, M C F" uniqKey="Toledo M" first="M. C. F." last="Toledo">M. C. F. Toledo</name></country><country name="Royaume-Uni"><noRegion><name sortKey="Dennis, M J" sort="Dennis, M J" uniqKey="Dennis M" first="M. J." last="Dennis">M. J. Dennis</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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