The Usage of Chalk as Potassium Permanganate Carrier for Extending the Storage Life of Lime Fruits

Abstract

This research explored the usage of an ethylene absorber made from 3% potassium permanganate (KMnO4 ) as a way of extending the storage life of lime fruits kept at 13 °C. Three ethylene absorber treatments were used and these were packed in netted bags. The treatments consisted of (1) chalk sticks (the control treatment), (2) chalk stick soaked in 3% KMnO4 and (3) chalk powder soaked in 3% KMnO4 . The ethylene absorber and limes were placed together on a foam tray, covered with PVC film and stored at 13 °C for 40 days. The results showed that the ethylene absorber made from chalk powder soaked in 3% KMnO4 preserved the fruit better than did the other treatments, and this treatment slowed the decline in titratable acidity content and total chlorophyll content. The scores awarded in consumer assessment of the treatment were also significantly higher for this than for other treatments. All studied treatments did not significantly effect on weight loss and total soluble solids of the fruits.