Separation of selected bioactive compounds from orange peel using the sequence of supercritical CO2 extraction and ultrasound solvent extraction: optimization of limonene and hesperidin content

S. Jokić,M. Molnar,Ana-Marija Cikoš,Martina Jakovljević,Silvija Šafranko,I. Jerković

Published 2019 in Separation Science and Technology

ABSTRACT

ABSTRACT The orange peel (Citrus sinensis L.) from the variety Washington Navel was extracted by supercritical CO2 (SC-CO2) at different parameters. The extracts were analyzed by gas chromatography-mass spectrometry (GC-MS) and high-performance liquid chromatography (HPLC). Limonene predominance was found (up to 89%). The principal oxygenated monoterpenes were linalool, α-terpineol, decanal, and (E)-citral. Ultrasound-assisted extraction was performed on the remaining solid residue (after SC-CO2extraction) to obtain the extracts rich in hesperidin. The influence of different extraction parameters on hesperidin content (3.3–23.0 µg/mL) was determined. The prediction performance in optimizing the extraction yield of dominant compounds was studied by response surface methodology and artificial neural network.

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