Degradation of carotenoids in dehydrated pumpkins as affected by different storage conditions.
Food research international (Ottawa, Ont.)(2018)
摘要
The degradation kinetics of carotenoids in dehydrated pumpkins, stored at 4, 25, and 40 °C under air or controlled atmosphere conditions (N2), was evaluated using reversed-phase high performance liquid chromatography coupled with diode array and mass spectrometry detectors. The degradations of predominant carotenoids including β-carotene, α-carotene and lutein depended on the storage temperature, the storage duration as well as the presence of oxygen, which was following the first-order kinetics. The temperature dependence of reaction constants were well explained by the Arrhenius relationship. The activation energy (Ea) for carotenoids degradation ranged from 23.69 kJ/mol for lutein in N2-packaged dehydrated pumpkins to 13.82 kJ/mol for β-carotene in air-packaged samples. Lutein was less degradable than α-carotene and β-carotene in dehydrated pumpkins during storage. Higher all-E-carotenoid degradation in N2-packaged dehydrated pumpkins stored at 40 °C occurred than that stored at lower temperature under N2 or air storage, and those storage conditions were beneficial to the formation of Z-isomers (e.g., 15-Z-β-carotene and 13-Z-β-carotene). Storage under N2 at 4 °C enhanced the retention of all-E-carotenoids in dehydrated pumpkins. Thus, package atmosphere should be paid more attention during long-term storage.
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