| SM ISO690:2012|
TSITSAGI, Mzia; TSITSISHVILI, Vladimer; EBRALIDZE, Ketevan. Sequential supercritical fluid extractions of bioactive compounds from tangerine and orange peel. In: Ecological and environmental chemistry 2017The 6th International Conference. 2-3 martie 2017, Chișinău. Chisinau, Republic of Moldova: Academy of Sciences of Moldova, 2017, p. 190.
|Ecological and environmental chemistry 2017 2017|
Conferința "Ecological and environmental chemistry 2017" |
Chișinău, Moldova, 2-3 martie 2017
Transformation of vegetables and fruits to food stuff creates agro industrial wastes. Peels, stems, cores, skin, seeds are remnants, that long been considered as undesirable materials, but nowadays, they are promising sources of valuable nutraceuticals. Our aim of the research was to develop the feasible process of extracting bioactive compounds from tangerine and orange peel and to best manage huge nonstandard tangerine and orange which is 1/3 of the harvest in Georgia. There are a lot of citrus peels produced as residues after production of fruit juices and concentrates. Citrus peels are rich source of essential oil, carotenes, natural flavanones such as hesperidin, and pectin. Sequential supercritical fluid extraction method we studded is eco friendly separation tool. Supercritical fluids (CO2, etc.) as solvent have advantage such as excellent mass transfer and control of fluid density by temperature and pressure, which provides high selectivity of extracted products. Process need standard technological equipment and is fast. First step of the process is supercritical CO2 extraction of essential oil. Principal component of tangerine oven dried peel oil is d-limonene (>90%). The influence of different operation conditions was analyzed in the range of pressure from 100 to 250 atm., at temperature 30, 40, 500C. Employing different conditions results different extract composition. Thus, optimum conditions depend on requirements for extracted essential oil. Second step is acetone modified supercritical CO2 extraction of β-carotene. The optimum conditions are 150 atm., 500C, and 7% acetone as a co-solvent. Third step is methanol modified supercritical CO2 extraction of hesperidin, the optimum conditions are 200-250 atm., 500C, and 5% methanol as a co-solvent. Studied and determined optimal parameters provide efficient, fast and selective extraction of target products. At least high quality pectin was extracted from dry waste material remained after above mention sequential supercritical extraction. Method can be used for utilization of any other citrus peel.