Optimisation of healthy-lipid content and oxidative stability during oil extraction from squid (illex argentinus) viscera by green processing
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Rodríguez Melis, Alicia
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Optimisation of healthy-lipid content and oxidative stability during oil extraction from squid (illex argentinus) viscera by green processing
Abstract
Green extraction was applied to Argentinean shortfin squid (Illex argentinus) viscera, consisting of a wet pressing method including a drying step, mechanic pressing, centrifugation of
the resulting slurry, and oil collection. To maximise the oil yield and ω3 fatty acid content and to
minimise the oil damage degree, a response surface methodology (RSM) design was developed
focused on the drying temperature (45–85 ◦C) and time (30–90 min). In general, an increase of the
drying time and temperature provided an increase in the lipid yield recovery from the viscera. The
strongest drying conditions showed a higher recovery than 50% when compared with the traditional chemical method. The docosahexaenoic and eicosapentaenoic acid contents in the extracted
oil revealed scarce dependence on drying conditions, showing valuable ranges (149.2–166.5 and
88.7–102.4 g·kg−1 oil, respectively). Furthermore, the values of free fatty acids, peroxides, conjugated
dienes, and ω3/ω6 ratio did not show extensive differences by comparing oils obtained from the
different drying conditions. Contrary, a polyene index (PI) decrease was detected with increasing
drying time and temperature. The RSM analysis indicated that optimised drying time (41.3 min) and
temperature (85 ◦C) conditions would lead to 74.73 g·kg−1
(oil yield), 1.87 (PI), and 6.72 (peroxide
value) scores, with a 0.67 desirability value.
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Spanish Government RTI2018-095659-B-I00
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Artículo de publícación WoS
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Mar. Drugs 2021, 19, 616
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