US EPA

1051192 

Journal Article 

Microwave-assisted extraction of phenolic antioxidants from potato peels 

Singh, A; Sabally, K; Kubow, S; Donnelly, DJ; Gariepy, Y; Orsat, V; Raghavan, GS 

2011 

1 

Molecules
ISSN: 1420-3049 

16 

3 

2218-2232 

English 

21383659 

10.3390/molecules16032218 

A response surface method was used to optimize the microwave-assisted extraction parameters such as extraction time (t) (min), solvent (methanol) concentration (S) (v/v) and microwave power level (MP) for extraction of antioxidants from potato peels. Max. total phenolics content of 3.94 mg g⁻¹ dry weight (dw) was obtained at S of 67.33%, t of 15 min and a MP of 14.67%. For ascorbic acid (1.44 mg g⁻¹ dw), caffeic acid (1.33 mg g⁻¹ dw), ferulic acid (0.50 mg g⁻¹ dw) max contents were obtained at S of 100%, t of 15 min, and MP of 10%, while the max chlorogenic acid content (1.35 mg g⁻¹ dw) was obtained at S of 100%, t of 5 min, and MP of 10%. The radical scavenging activity of the extract was evaluated by using the DPPH assay and optimum antioxidant activity was obtained at S of 100%, t of 5 min, and MP of 10%. 

response surface method; chlorogenic acid; ferulic acid; ascorbic acid; DPPH; potato peel