Sustainable Drying and Green Deep Eutectic Extraction of Carotenoids from Tomato Pomace
FOODS(2022)
摘要
The extraction of molecules with high added value plays an important role in the recovery of food waste. This work aimed to valorize tomato pomace, a by-product composed of skin and seeds, through extraction of carotenoids, especially lycopene and beta-carotene. The tomato pomace was dried using three different methods (freeze-drying, heat drying, and non-thermal air-drying) to reduce its weight, volume, and water activity and to concentrate the carotenoid fraction. These drying approaches were compared considering the extractive potential. Three solvent mixtures were compared, a traditional one (n-hexane:acetone) and two green deep eutectic solvent mixtures (ethyl acetate:ethyl lactate and menthol:lactic acid) in combination with different drying procedures. The extract obtained using ethyl acetate:ethyl lactate with non-thermal air-drying showed the highest contents of lycopene and beta-carotene (75.86 and 3950.08 mu g/g of dried sample, respectively) compared with the other procedures.
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关键词
tomato pomace, lycopene, beta-carotene, extraction, sustainability, food by-products, deep eutectic solvents, non-thermal drying
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