Bulk storage of mango (Mangifera indica L.) and pineapple (Ananas comosus L.) pulp: effect of pulping and storage temperature on phytochemicals and antioxidant activity.

Palitha C Arampath,Matthijs Dekker

doi:10.1002/jsfa.9762

Abstract

BACKGROUNDThe effects of pulp extraction, thermal treatment and bulk storage of mango (Mangifera indica L.) and pineapple (Ananas comosus L.) pulps for 20 weeks at ambient (28 ± 2 °C) and cold (4 °C) temperatures on the bioactive phytochemicals and antioxidant activity were investigated.RESULTSThe contents of total polyphenols in mango (10.5%) and pineapple (5.4%) increased during pulping. The ratio of the degradation rate constants (k d values) (28 ± 2 °C: 4 °C) of vitamin C, polyphenols, Trolox equivalent antioxidant capacity (TEAC) and β‐carotene ranged from 2–4.5 and 1.5–2.7 in mango and pineapple pulps, respectively. The k d values of tannic acid, chlorogenic acid, epicatechin and catechin in mango pulp were 1.5–1.8 times higher under ambient storage than in cold storage. Furthermore, in pineapple pulp, the degradation rates of the same components were 1.6, 1.6, 2.1 and 1.4 times, respectively, faster at room temperature than in cold storage. The bulk storage of pulps at 4 °C provided better retention of health‐promoting compounds than ambient temperature storage for up to 20 weeks.CONCLUSIONBulk storage of mango and pineapple pulp under cold storage conditions (4 °C) is recommended as a better pulp preservation method than storage at ambient (28 ± 2 °C) temperature. © 2019 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

Highlights

Mango (Mangifera indica L.) and pineapple (Ananas comosus L.) are commercially important tropical fruits in the world fruit trade
There were significant reductions in the vitamin C, total polyphenols, Trolox equivalent antioxidant capacity (TEAC) and β-carotene values in both mango and pineapple pulp during the heat treatment at 100 ∘C for 20 to 25 min; the reductions were relatively smaller for pineapple
Based on multivariate principal component analysis (PCA), vitamin C, total polyphenols, and β-carotene values are closer to the TEAC values

Summary

Introduction

Mango (Mangifera indica L.) and pineapple (Ananas comosus L.) are commercially important tropical fruits in the world fruit trade. Mature or ripe fruits are consumed fresh or in processed forms, including as juice, nectar, canned and dehydrated products. Mango is a tropical fruit that is cultivated in many countries with a tropical climate, including Sri Lanka, its global importance. Bulk storage of the pulp or juice is a common practice of the fruit processors in Sri Lanka to preserve raw material for continuous production during offseason. The effects of pulp extraction, thermal treatment and bulk storage of mango (Mangifera indica L.) and pineapple (Ananas comosus L.) pulps for 20 weeks at ambient (28 ± 2 ∘C) and cold (4 ∘C) temperatures on the bioactive phytochemicals and antioxidant activity were investigated

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