• Recovery of Steroidal Alkaloids from Potato Peels Using Pressurized Liquid Extraction

      Rawson, Ashish; Aguiló-Aguayo, Ingrid; Brunton, Nigel; Hossain, Mohammad Billal; Rai, Dilip K.; Department of Agriculture, Food and the Marine; 08/RD/AFRC/673 (MDPI, 2015-05-13)
      A higher yield of glycoalkaloids was recovered from potato peels using pressurized liquid extraction (1.92 mg/g dried potato peels) compared to conventional solid–liquid extraction (0.981 mg/g dried potato peels). Response surface methodology deduced the optimal temperature and extracting solvent (methanol) for the pressurized liquid extraction (PLE) of glycoalkaloids as 80 °C in 89% methanol. Using these two optimum PLE conditions, levels of individual steroidal alkaloids obtained were of 597, 873, 374 and 75 µg/g dried potato peel for α-solanine, α-chaconine, solanidine and demissidine respectively. Corresponding values for solid liquid extraction were 59%, 46%, 40% and 52% lower for α-solanine, α-chaconine, solanidine and demissidine respectively