Effects of cold storage on essential oils of peel of Thompson navel oranges
1992
Usai, M. | Arras, G. | Fronteddu, F.
Thirty-three constituents accounting for 96.64% of total volatiles of Thompson navel orange peel oils have been identified and quantified in a single GC capillary run. The quantitation was performed using appropriate response factors and identification using pure samples and GC-mass spectrometry. After identification, experiments were carried out to test qualitative and quantitative differences on essential oils of peel of Thompson navel oranges stored under different cold-storage conditions. During storage at a constant temperature of 6 degrees C and at a cyclic temperature of 6 days at 2 degrees C plus 1 day at 14 degrees C, an increase of volatile compounds (acetaldehyde, formic acid, formaldehyde, and acetic acid) and a decrease of limonene content were observed. The cold-storage trials with Thompson navel oranges showed that the minor variations in the content of essential oils were obtained using cyclic temperature storage with short cycles: 6 days at 6 degrees C plus 1 day at 14 degrees C and 18 days at 6 degrees C plus 7 days at 14 degrees C.
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