Screening the effect of different extraction methods (ultrasound-assisted extraction and solid-liquid extraction) on the recovery of glycoalkaloids from potato peels: Optimisation of the extraction conditions using chemometric tools

Apel, Cecile; Lyng, James G.; Papoutsis, Konstantinos; Harrison, Sabine M.; Brunton, Nigel P.

doi:10.1016/j.fbp.2019.06.018

Research article2020Peer reviewed

Screening the effect of different extraction methods (ultrasound-assisted extraction and solid-liquid extraction) on the recovery of glycoalkaloids from potato peels: Optimisation of the extraction conditions using chemometric tools

Apel, Cecile; Lyng, James G.; Papoutsis, Konstantinos; Harrison, Sabine M.; Brunton, Nigel P.

Abstract

Solid-liquid extraction (SLE) (extraction time (5.5-69.5 min) and temperature (25.5-89.5 degrees C)) and ultrasound-assisted extraction (UAE) (extraction time (5-25 min) and temperature (25-85 degrees C), and amplitude (50-100%)) were investigated and optimised as a means to recover steroidal alkaloids from potato peel. Optimisation for the recovery of alpha-solanine, alpha-chaconine, and total glycoalkaloid content (TGA) from potato peels was performed using a central composite design (CCD) and Box-Behnken design for SLE and UAE, respectively. For SLE, the recovery of glycoalkaloids increased with increasing temperature, while time had no significant effect (at p <0.05). The optimum conditions for the recovery of alpha-solanine, alpha-chaconine, and TGA during SLE were found to be an extraction time of 76.6 min and extraction temperature of 83.5 C. For UAE, the recovery of glycoalkaloids also increased with increasing extraction temperature (at p <0.05). However, amplitude and extraction time did not significantly affect the recovery of the targeted metabolites (at p <0.05). The optimum conditions for the recovery of alpha-solanine, alpha-chaconine, and TGA during UAE were found to be an extraction time of 20 min, temperature of 85 degrees C, and amplitude of 100%. SLE resulted in significantly higher recoveries of glycoalkaloids than UAE with both models accurately predicting extraction yields as confirmed by experiments conducted under optimum conditions. (C) 2019 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

Keywords

Solanum tuberosum; Potato waste; Glycoalkaloids; Optimisation; Cavitation

Published in

Food and Bioproducts Processing
2020, volume: 119, pages: 277-286
Publisher: ELSEVIER

SLU Authors

Papoutsis, Konstantinos
- University College Dublin

UKÄ Subject classification

Food Engineering

Publication identifier

DOI: https://doi.org/10.1016/j.fbp.2019.06.018

Permanent link to this page (URI)

https://res.slu.se/id/publ/131932