Title: Impact of activated carbon from date pits, potassium permanganate and their combination on extending the postharvest quality of three maturity stages of guava during cold storage

Authors: Ayman Mohammed El-Anany; Gamal Fathy A. Hassan

Addresses: Special Food and Nutrition Department, Food Technology Research Institute, Agricultural Research Center, 9 El-Gamaa St., Giza, Egypt ' Fruit Handling Department, Horticulture Research Institute, Agricultural Research Center, 9 El-Gamaa St., Giza, Egypt

Abstract: The aim of the current investigation was to evaluate the effect of Potassium permanganate, activated carbon from date pits and both on the extension of postharvest quality of three maturity stages of guava during cold storage at (8°C, 90 ± 5%, % RH). Quality characteristics considered were weight loss percentage, percentage of decayed fruit, firmness, colour, total soluble solids (TSS), titratable acidity and vitamin C. The results showed that within each ripening stage, the treated fruit remained better than that of control during storage periods. It can also be deduced that guava fruit treated with potassium permanganate, activated carbon of date pits, and their showed lower weight loss (%), total soluble solids (TSS) contents, acidity and spoilage incidence while vitamin C values, firmness and colour (hue angle) were higher in treated fruit when compared with control at the end of storage period. Data also showed the synergistic effect of potassium permanganate, activated carbon in improving the quality of guavas during storage process.

Keywords: activated carbon; potassium permanganate; maturity stages; guava fruit; date pits; postharvest quality; maturity stages; cold storage.

DOI: 10.1504/IJPTI.2013.060272

International Journal of Postharvest Technology and Innovation, 2013 Vol.3 No.4, pp.403 - 425

Received: 14 Mar 2013
Accepted: 19 Nov 2013
Published online: 05 Jul 2014 *

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