Abstract
Introduction
The main purposes of this study were to identity major peel oil odorants and determine which aroma compounds are primarily responsible for the overall aroma profile of a recently developed Huanglongbing (HLB)-tolerant mandarin hybrid.
Methods
The aroma-active compounds present in the recently developed mandarin hybrid peel oil were extracted by solvent-assisted flavor evaporation (SAFE) and then analyzed by gas chromatography-mass spectrometry/olfactometry (GC-MS/O) and aroma extract dilution analysis (AEDA).
Results
Thirty odor-active compounds in the flavor dilution (FD) factor range of 2 to 256 have been identified. On the basis of high FD factors, α-pinene, limonene, β-myrcene, linalool, and β-caryophyllene were characterized as the most essential aroma compounds at a FD factor ≥ 128, followed by γ-terpinene, β-pinene, terpinolene, p-dimethylstyrene, (E)-linalool oxide, decanal, β-cubebene, α-terpineol, and perilla aldehyde at a FD factor ≥ 16. Among all the detected aroma compounds, limonene was the most abundant compound (86.5 ± 2.8%), followed by γ-terpinene (5.3 ± 0.1%), β-myrcene (2.4 ± 0.1%), and α-pinene (1.2 ± 0.0%).
Conclusions
The compounds including α-pinene, limonene, β-myrcene, linalool, and β-caryophyllene were characterized as the most essential aromas. The sensory evaluation results indicated that the major attributes (FD ≥ 2) such as floral, lemon, peel-like, green, mint, and sweet were comparable to that of natural mandarin peel oil.
Implications
Based on the human perception, olfactometry and AEDA were used to determine the aroma-active compounds in the peel oil. Human perception also involved in aroma reconstitution to compare the re-engineering solution containing the essential aroma compounds with the natural mandarin oil.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study protocol and consent procedure received ethical approval from the Institutional Review Board (IRB) of the University of Florida.
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Huang, M., Valim, M.F., Feng, S. et al. Characterization of the Major Aroma-Active Compounds in Peel Oil of an HLB-Tolerant Mandarin Hybrid Using Aroma Extraction Dilution Analysis and Gas Chromatography-Mass Spectrometry/Olfactometry. Chem. Percept. 10, 161–169 (2017). https://doi.org/10.1007/s12078-017-9221-y
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DOI: https://doi.org/10.1007/s12078-017-9221-y