Ultrasonic extraction of bioactive compounds from almond peels and assessment of their antioxidant activity

Abstract

The antioxidant activities of almond peels extracts were evaluated and compared with the antioxidant Butylated

Hydroxy Toluene ( BHT) using the following tests: reducing power, beta-carotene bleaching, hydrogen peroxide

scavenging activity, and F.TC.. almond peels were extracted with different polarities solvents (methanol , ethanol,

ethyl acetate, chloroform and hexane ). The properties of extraction solvents significantly affected Extraction yield

, total phenolic compound and antioxidant activity of peels extract, methanol (80%) as extraction media give

highest extracted yield of crude extract from peels, also the methanolic extract showed highest content of total

phenolic compounds compared with other extraction solvents used in study .The methanolic crude extract of peels

has better antioxidant activity compared with samples treated with extracts by other extraction solvents . The

antioxidant activities can be arranged as follow: BHT > Extracted with methanol> Extracted with ethanol

>Extracted with ethyl acetate > Extracted chloroform > Hexane extracted.