Optimisation of pressurised liquid extraction of antioxidants from black bamboo leaves

Title
Optimisation of pressurised liquid extraction of antioxidants from black bamboo leaves
Authors
상아방김상민엄병헌
Keywords
Phyllostachys nigra; Antioxidants; Superheated process; Total phenolic; Total flavonoid
Issue Date
2014-07
Publisher
Food chemistry
Citation
VOL 154, 164-170
Abstract
To develop an efficient green extraction approach for recovering bioactive compounds from natural plants, the potential of using pressurised liquid extraction (PLE) was examined on black bamboo (Phyllostachys nigra) leaves, with ethanol/water as solvents. The superheated PLE process showed a higher recovery of most constituents and antioxidative activity, compared to reflux extraction, with a significantly improved recovery of the total phenolic (TP) and flavonoid (TF) content and DPPH radical scavenging ability. For a broad range of ethanol aqueous solutions and temperatures, 50% EtOH and 200 °C (static time: 25 min) gave the best performance, in terms of the TP and TF (75% EtOH) content yield and DPPH scavenging ability (25% EtOH). Under the optimised extraction conditions, eight main antioxidative compounds were isolated and identified with HPLC-ABTS+ assay guidance and assessed for radical scavenging activity. The superheated extraction process for black bamboo leaves enhanced the antioxidant properties by increasing the extraction of the phenolic components.
URI
http://pubs.kist.re.kr/handle/201004/47488
ISSN
03088146
Appears in Collections:
KIST Publication > Article
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