Abstract
Peanut skin is a waste of peanut industries especially peanut butter industries. Peanut skin contain high antioxidant and high nutritional values. The objective of this study was to optimize the effect of parameters to obtain high extract yield and high antioxidant activity by using supercritical carbon dioxide and co-solvent ethanol. A Box-Behnken design (BBD) was used to optimize the extraction process at the condition temperature (40, 55 and 70 ºC), rate of co-solvent ethanol (2.5, 5, and 7.5 % Vethanol/Vtotal), and extraction pressure (10, 20 and 30 MPa). The extraction time was 3 hours. The optimum condition to obtain yield of extraction and antioxidant activity 22.05 MPa, 62.76 °C and 6.03 %(Vethanol/Vsolvent) with 15.404 % yield extract and 94.040 % antioxidant activity.
Highlights
Peanut is an agricultural product that has been used for many dishes in the asean country such as Indonesia, Malaysia and Philippines
Peanut skin decreases the quality of product because peanut skin has astringent taste
Astringent taste indicates that peanut skin contains high antioxidant inside of its skin
Summary
Peanut is an agricultural product that has been used for many dishes in the asean country such as Indonesia, Malaysia and Philippines. Peanut skin is always removed from peanut due to taste of product. Peanut skin decreases the quality of product because peanut skin has astringent taste. Astringent taste indicates that peanut skin contains high antioxidant inside of its skin. Previous researcher has already found that peanut skin contains procyianidin, catechin, epicatechin, and anthocyanidin [1,2]. Most of this antioxidant of peanut skin extract reduced risk of cardiovascular diseases and cancers, anti-diabetic, antiinflammatory [3]
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