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ISHS Acta Horticulturae 971: XII International Symposium on the Processing Tomato

PREPARATION, STABILITY AND APPLICATION OF LYCOPENE-CONTAINING MICROEMULSION

Authors:   Shengkun Yan, Jing Li, Hong Li, Xiaowen Wang, Huawei Zhang, O. Elshareif, Lianfu Zhang
Keywords:   microemulsion, lycopene, isomers, stability, juice
DOI:   10.17660/ActaHortic.2013.971.19
Abstract:
Lycopene is known for its mechanism of action against various types of cancers and chronic diseases, but its poor solubility in water limited its application in food. The objectives of this study were to prepare lycopene-containing microemulsions to increase its solubility in water, check its stability and apply this solution in lycopene fortified soft drinks: We selected suitable oil to melt lycopene, confirmed the formula and optimal technology to prepare the microemulstions. Then, geometrical configuration changes of lycopene were analyzed by UV-VIS Spectrophotometer and HPLC. Finally, we tried to prepare clean tomato juice using this microemulsion as colorant. The results showed that lycopene content in the lycopene-containing microemulsions reached 1.0 g/100 ml, particle sizes of microemulsions center on 14.34nm. The lycopene-containing microemulsion was transparent, in bright-red color and can be diluted with water in any ratio. Lycopene configuration check showed that the ratio of Z-isomers to total lycopene changed from ≤10 to ≥25%. The application test showed that lycopene-containing microemulsion can be easily used as a food colorant in tomato juice producing and it was stable during the shelf life of the products.

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