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      CARACTERIZACIÓN DE LOS COMPUESTOS VOLÁTILES ACTIVOS OLFATIVAMENTE EN UCHUVA (Physalisperuviana L.) Translated title: CHARACTERIZATION OF ODOR-ACTIVE VOLATILES IN UCHUVA (Physalis peruviana L.) Translated title: CARACTERIZAÇÃO DE COMPOSTOS VOLÁTEIS ATIVOS OLFATIVAMENTE EM UCHUVA (Physalis peruviana L.)

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          Abstract

          Durante el estudio de los compuestos activos olfativamente en el aroma de la uchuva (Physalis peruviana L.) se identificaron los compuestos volátiles, obtenidos por 3 técnicas, extracción líquido-líquido con pentano-diclorometano (1:1) (LL), Solvent-Assisted Flavor Evaporation (SAFE) y í/eadspace-Microextracción en fase sólida (HS-MEFS), y se encontraron diferencias en la calidad del aroma de los extractos mediante el análisis olfato-métrico. La técnica SAFE permitió obtener un extracto con un aroma muy semejante al de la fruta fresca. Los compuestos que presentaron los valores más altos de factor de dilución de aroma (FD) fueron: hexanal, 3-hidroxi-2-butanona, 2-metil-propanol, 2-hidroxibutanoato de etilo, octanoato de etilo y 3-hidroxibutanoato de butilo. En el extracto LL se detectaron algunos compuestos sin actividad olfativa en la fruta; en contraste, mediante la técnica de HS-MEFS no fue posible detectar todos los compuestos activos olfativamente, principalmente los de mayor polaridad. Estos resultados muestran la utilidad del nuevo enfoque de análisis en química de aromas, el cual le da más relevancia al análisis olfativo en estos estudios.

          Translated abstract

          During the study of odor-active active compounds in the aroma of cape gooseberry (Physalis peruviana L.), volatile compounds obtained by three techniques-liquid liquid extraction with penta-ne-dichloromethane (1:1) (LL), Solvent-Assisted Flavor Evaporation (SAFE) and Headspace-Solid Phase Microextraction (HS-SPME) were identified. Differences in the aroma quality of the extracts were found by olfactometric analyses. The SAFE technique allowed obtain in ganextract with similar aroma to the freshfruit. Thecompounds with highest Flavor Dilution factor (FD) value were hexanal, 3-hydroxy-2-butanone, 2-methylpropanol, ethyl 2-hydroxybutanoate, ethyl octanoate, and butyl 3-hydroxybutanoate. Some compounds without olfactive activity in the fruit aroma were detected in the LL extract; in contrast, it was not possible todetectalloftheodor-activevolatilesby using HS-SPME technique, especially those of the most polarity. These results showtheutilityinusingthenewapproach of flavor chemistry analysis, which gives more relevance to the odor analysis during these studies.

          Translated abstract

          Durante o estudo de compostos olfativos ativos no aroma de uchuva (Physalis peruviana L.), foram identificados os compostos voláteis obtidos por três técnicas: extração líquido-líquido com pentano-diclorometano (1:1) (LL), Solvent-Assisted Flavor Evaporation (SAFE) e Heads-pace-Microextração em Fase Sólida (HS-MEFS). Também se acharam diferenças na qualidade do aroma dos extratos por meio de análise de olfatometria. A técnica SAFE permitiu a obtenção de um extrato com um aroma semelhante à fruta fresca. Os compostos que apresentaram os maiores valores de fator de diluição de aroma (FD) foram: hexanal, 3-hidroxi-2-butanona, 2 metilpropanol, octanoato de etilo e 3-hidroxibutanoato de butilo. No extracto LL foram detectados alguns compostos sem atividade olfativa no fruto; em contrapartida, pela técnica de HS-MEFS não foi possível detectar todos os compostos ativos olfativamente, principalmente os de maior polaridade. Estes resultados mostram a utilidade do uso de uma nova abordagem para a análise de química do aroma, que dá mais importância á análise olfativa em estes estudos.

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          Most cited references20

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          Applications of solid-phase microextraction in food analysis.

          Food analysis is important for the evaluation of the nutritional value and quality of fresh and processed products, and for monitoring food additives and other toxic contaminants. Sample preparation, such as extraction, concentration and isolation of analytes, greatly influences the reliable and accurate analysis of food. Solid-phase microextraction (SPME) is a new sample preparation technique using a fused-silica fiber that is coated on the outside with an appropriate stationary phase. Analyte in the sample is directly extracted to the fiber coating. The SPME technique can be used routinely in combination with gas chromatography (GC), GC-mass spectrometry (GC-MS), high-performance liquid chromatography (HPLC) or LC-MS. Furthermore, another SPME technique known as in-tube SPME has also been developed for combination with LC or LC-MS using an open tubular fused-silica capillary column as an SPME device instead of SPME fiber. These methods using SPME techniques save preparation time, solvent purchase and disposal costs, and can improve the detection limits. This review summarizes the SPME techniques for coupling with various analytical instruments and the applications of these techniques to food analysis.
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            Solvent assisted flavour evaporation - a new and versatile technique for the careful and direct isolation of aroma compounds from complex food matrices

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              Determination of Potent Odourants in Foods by Aroma Extract Dilution Analysis (AEDA) and Calculation of Odour Activity Values (OAVs)

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                Author and article information

                Journal
                rcq
                Revista Colombiana de Química
                Rev.Colomb.Quim.
                Departamento de Química, Universidad Nacional de Colombia. (Bogotá, Distrito Capital, Colombia )
                0120-2804
                2357-3791
                December 2010
                : 39
                : 3
                : 389-399
                Affiliations
                [01] Bogotá orgnameUniversidad Nacional de Colombia orgdiv1Facultad de Ciencias orgdiv2Departamento de Química Colombia
                Article
                S0120-28042010000300007 S0120-2804(10)03900307
                d4306110-d606-4a6e-8ecf-2518e82cf76e

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 12 November 2010
                : 01 August 2010
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 20, Pages: 11
                Product

                SciELO Colombia

                Self URI: Texto completo solamente en formato PDF (ES)
                Categories
                Aticulos originales de investigación

                Physalis peruviana,uchuva,aroma,volátiles activos olfativamente,SAFE,CG-olfatometría,cape gooseberry,flavor,odor-active volatile compounds,CG-olfactometry,compostos voláteis ativos olfativamente,CG-Olfatometria

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