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Optimisation of supercritical carbon dioxide extraction of lutein esters from marigold ( Tagetes erect L . ) with soybean oil as a co‐solvent
Author(s) -
Ma Qingxiang,
Xu Xiang,
Gao Yanxiang,
Wang Qi,
Zhao Jian
Publication year - 2008
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/j.1365-2621.2007.01694.x
Subject(s) - supercritical carbon dioxide , lutein , tagetes , soybean oil , yield (engineering) , supercritical fluid , solvent , carbon dioxide , chemistry , extraction (chemistry) , volumetric flow rate , chromatography , botany , materials science , organic chemistry , food science , thermodynamics , carotenoid , biology , physics , metallurgy
Summary Response surface methodology was used to optimise the conditions of supercritical carbon dioxide extraction of lutein esters from marigold ( Tagetes erect L.) with soybean oil as a co‐solvent. The effect of pressure, temperature, CO 2 flow rate and soybean oil concentration, and their interactions on the yield of lutein was investigated. Results showed that the data could be well fitted to a second‐order polynomial model with a R 2 ‐value of 0.9398. The independent parameters of flow rate, pressure, temperature, all quadratics as well as the interactions between flow rate and pressure, and between flow rate and temperature affected the yield significantly ( P ≤ 0.05). The model predicted that the optimal conditions were 35.5 MPa, 58.7 °C, CO 2 flow rate of 19.9 L/h with 6.9% of soybean oil as a co‐solvent, and under such conditions, the maximum yield of 1039.7 mg lutein /100 g marigold could be achieved.