Abstract

Peach skin is a byproduct from the further processing of fresh peaches with the potential to be recovered and utilized as a natural antioxidant. Color analysis, phenolic content and antioxidant activity of peach skin from 13 varieties of peaches grown in South Carolina were determined. Color analysis indicated that Norman, Cary Mac, Ruby Prince and Flame Prince differed from other varieties of peaches. Antioxidant activity of peach skin extracts were evaluated by the total phenolics (TP), DPPH free radical scavenging (DPPH), ferric reducing antioxidant power (FRAP) and ferrous ion chelating (FIC) assays. The range of total phenolics content was 8.38 - 18.81 (gallic acid equivalent mg/g dry weight). The total phenolic content was highly correlated to DPPH and FRAP activity in peaches ranging from 8 - 23 AE/mg and 5 - 12 AE/mg, respectively. Three peach varieties with skins having the greatest antioxidant capacity were Red Globe, Scarlet Prince, and O’Henry.

Highlights

  • Peach (Prunus persica) is one of the most popular fruits worldwide partly due to its good taste and nutrient composition [1] [2]

  • Researchers have indicated that phenolic compounds play an important role in antioxidant activity of peaches [5]

  • Major phenolic compounds found in peaches include caffeic acid, chlorogenic acid, leucoanthocyanins, catechins and flavonols [5] [6]

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Summary

Introduction

Peach (Prunus persica) is one of the most popular fruits worldwide partly due to its good taste and nutrient composition [1] [2]. In the early 1970s, the annual per capita consumption of peaches in the US reached a peak of 13 pounds. (2015) Antioxidant Activity Assessment and Color Analysis of Skin from Different Peach Varieties Grown in South Carolina. In 2012, South Carolina had a total of 17,000 acres of peach trees, total peach production reached 75,000 tons which was valued at over $74 million. Unutilized peaches could be further processed to recover valuable products including natural antioxidants. The possibility of extracting antioxidants from South Carolina peach skin byproducts has not been previously reported. Researchers have indicated that phenolic compounds play an important role in antioxidant activity of peaches [5]. Major phenolic compounds found in peaches include caffeic acid, chlorogenic acid, leucoanthocyanins, catechins and flavonols [5] [6]. Desmond and Daniele (2008) [7] pointed out that phenolic compounds were concentrated in peach skin

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