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Title: Characterization of volatile compounds in selected citrus fruits from Asia
Keywords: citrus, volatile compounds, Gas Chromatography, Aroma Extract Dilution Analysis, Pontianak orange, aroma-active compounds
Issue Date: 15-Jan-2009
Citation: JORRY DHARMAWAN (2009-01-15). Characterization of volatile compounds in selected citrus fruits from Asia. ScholarBank@NUS Repository.
Abstract: The characterization of volatile compounds in selected citrus fruits from Asia, namely Indonesian Pontianak orange, Indian Mosambi and Philippine Dalandan, was carried out. Continuous liquid-liquid extraction and Solid Phase Microextraction (SPME) were utilized to extract the volatiles from the juices prior to analysis with Gas Chromatography (GC), while direct injection to the GC was done for the peel oils. The profile of volatile compounds found in Mosambi was generally comparable to typical sweet orange whereas Dalandan was to typical mandarin. On the other hand, Pontianak orange portrayed its unique flavour profile. Further investigation was explored to unveil the key compounds in Pontianak orange peel oil. GC-Olfactometry (GC-O) was used to screen the potent odourants and Aroma Extract Dilution Analysis (AEDA) technique performed was effective in revealing 41 aroma active compounds. Aroma reconstitution and omission test were subsequently carried out to verify the findings by sensory evaluation of aroma models. The results suggested that (Z)-5-dodecenal and 1-phenyl ethyl mercaptan were the significant contributors to the flavour of Pontianak orange.
Appears in Collections:Ph.D Theses (Open)

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