Ultrasonic extraction of steroidal alkaloids from potato peel waste

Abstract

Potato processors produce large volumes of waste in the form of potato peel which is either discarded or sold at a low price. Potato peel waste is a potential source of steroidal alkaloids which are biologically active secondary metabolites which could serve as precursors to agents with apoptotic, chemopreventive and anti-inflammatory properties. The present study investigated the relative efficacy of ultrasound assisted extraction (UAE) and solid liquid extraction (SLE) both using methanol, to extract steroidal alkaloids from potato peel waste and identified optimal conditions for UAE of α-solanine, α-chaconine, solanidine and demissidine. Using response surface methodology optimal UAE conditions were identified as an amplitude of 61 μm and an extraction time of 17 min which resulted the recovery of 1102 μg steroidal alkaloids/g dried potato peel (DPP). In contrast, SLE yielded 710.51 glycoalkaloid μg/g DPP. Recoveries of individual glycoalkoids using UAE yielded 273, 542.7, 231 and 55.3 μg/g DPP for α-solanine, α-chaconine, solanidine and demissidine respectively. Whereas for SLE yields were 180.3, 337.6, 160.2 and 32.4 μg/g DPP for α-solanine, α-chaconine, solanidine and demissidine respectively. The predicted values from the developed second order quadratic polynomial equation were in close agreement with the experimental values with low average mean deviation (E<5%) values. Predicted models were highly significant (p<0.05) for all parameters studied. This study indicates that UAE has strong potential as an extraction method for steroidal alkaloids from potato peel waste.

Modern extraction techniques optimized to extract betacyanins from Gomphrena globosa L.

“…For instance, MAE, a green extraction methodology, is gaining relevance due to its high extraction efficiency, and achievement of products with superior quality at a much lower cost (Pinela et al, 2016b). Among all the mentioned advantages, UAE offers particular advantages, such as mechanical effects, which allow a greater solvent penetration within the matrix, thus increasing the contact area solid/ liquid (Hossain et al, 2014).…”

Metabolomics for the Authentication of Natural Extracts Used in Flavors and Fragrances: the Case Study of Violet Leaf Absolutes from Viola odorata

“…For that purpose, a common alkaloid extraction process was applied to fresh violet leaves . For that purpose, a CH 2 Cl 2 /MeOH (50:50, v / v ) extract from fresh violet leaves was thus obtained. The alkaline fractions of the absolute as well as the CH 2 Cl 2 /MeOH extract were analyzed by UHPLC‐ToFMS.…”

An update of therapeutic potential and bioanalytical aspects of steroidal glycoalkaloid (solanidine)

“…From the result, it was found that ultrasound assisted extraction process I was better for steroidal alkaloids from potato peel waste compared to the other one [42].…”