Total Phenolic Content, Antioxidant Activity, Some Physical and Chemical Properties of Pestil

Abstract

The objective of the present investigation is to determine total phenolic

content, antioxidant activity, some physical and chemical properties of

mulberry pestil (without additive, with glucose, with peanut, with walnut),

plum pestil and cornelian cherry pestil. Total phenolic content of the

water extracts of pestil samples was estimated as gallic acid equivalents

(GAE) by Folin-Ciocalteu method spectrophotometrically. The antioxidant

activity of water extracts prepared from pestil samples was

measured by β-carotene bleaching method. Total phenolic content was

found from 4.79 (mulberry pestil without additive) to 28.36 μg GAE/mg

(plum pestil). The antioxidant activity of pestil samples varied from

40.05 % (mulberry pestil without additive) to 90.92 % (plum pestil).

Dry matter, ash, protein, total sugar, reducing sugar, sucrose, pH, titratable

acidity, colour (L, a, b), thickness of pestil samples were determined

between 75.30-87.53 %, 0.18-3.42 %, 2.44-7.35 %, 30.91-54.60 %,

21.38-41.05 %, 0.83-27.54 %, 3.39-5.72 %, 0.06-6.25 % (malic acid);

27.35-41.35, (+1.25)-(+11.50), (+0.99)-(+18.22), 0.57-6.40 mm, respectively.

The present study shows that pestil samples had high amount of

phenolics content, antioxidant activity, carbohydrates and protein content.