首页|Evaluation of quality properties and antioxidant activities of tiger nut (Cyperus esculentus L.) oil produced by mechanical expression or/with critical fluid extraction
Evaluation of quality properties and antioxidant activities of tiger nut (Cyperus esculentus L.) oil produced by mechanical expression or/with critical fluid extraction
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NSTL
Elsevier
The quality properties and antioxidant activities of tiger nut (Cyperus esculentus L.) oil produced using mechanical expression with subcritical n-butane extraction (ME-SBE) and supercritical CO2 extraction (ME-SCO2E) were investigated and compared with mechanical expression or critical fluid extraction. Results showed that the highest extraction yield was obtained by ME-SBE (28.47 +/- 0.20 g/100 g) and ME-SCO2E (28.56 +/- 0.24 g/100 g). The content of tocopherols, beta-carotene and total phenolic compound in oil extracted by ME-SBE (30.69 +/- 0.15 mg/100 g, 160.56 +/- 7.98 mu g/100 g and 28.79 +/- 0.34 mg sinapic acid/100 g, respectively) were the highest, and followed by ME-SCO2E oil, For fatty acid composition, five oils were similar and rich in oleic acid (73.81-74.10%) and linoleic acid (8.75-8.89%). Furthermore, oil extracted by ME-SBE presented the uppermost antioxidant activities and oxidation stability, which were correlated with alpha-tocopherols, total tocopherols and total phenolic compound content. Thus, mechanical expression with subcritical n-butane extraction appeared to be preferable for tiger nut oil extraction.
NSTL
Elsevier
