Calcium Chloride Efficacy on Physicochemical Properties and Microbial Count of Chrysophyllum albidum- Linn Fruit during Storage

Abstract

Chrysophyllum albidum fruits are underutilized because they are seasonal and perishable in nature due to physiological, biochemical and microbial alteration. This study investigated the potency of calcium chloride (CaCl2) in suppressing postharvest deterioration of Chrysophyllum albidum fruits. Ripe wholesome fruits of Chrysophyllum albidum were harvested and treated with different concentrations of CaCl2 (1, 2, and 3%) at three different dip times (5, 10, and 15 min). The goal was to use established analytical methods to investigate the influence of CaCl2 on the firmness, weight loss, pH, titratable acidity, total sugar (TS), pectin, color, microbial (fungi and bacteria) loads of Chrysophyllum albidum fruits. All the treated fruits were stored at ambient temperature 28 ± 2°C and 90± 5% relative humidity for 15 days. The obtained results indicated that treating Chrysophyllum albidum fruits with 3% CaCl2 for 15 min was found the most effective in controlling weight loss, microbial load, color, firmness, and other compositional changes such as pH, titratable acidity, pectin and total sugar. It was observed that CaCl2 treated samples showed reduced fungal loads from 6.00 × 103 SFU/g at harvest to 0.02 × 103 SFU/g after 15 d of storage as compared to untreated samples. No record of bacterial load was detected on Chrysophyllum albidum fruits treated with 3% CaCl2 for 15 min. The shelf life of Chrysophyllum albidum fruits could be extended for 15 d without excessive deterioration in quality by treating the fruits with 3% CaCl2 for 15 min with a minimum quality loss, as compared to the control sample which had greater compositional changes with maximum quality loss during storage at ambient temperature.

Keywords

• african star apple
• chrysophyllum albidum
• calcium chloride
• storage
• microbial load