Effects of gaseous ozone on physicochemical and antioxidant properties of citrus fruit juice

Md Sidek, Nurin Syahirah (2017) Effects of gaseous ozone on physicochemical and antioxidant properties of citrus fruit juice. [Project Paper] (Submitted)

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Abstract

This study is an investigation on the effects of ozone gaseous on physicochemical and antioxidant properties of orange, lemon and lime juice. This study also examine the correlations of ozone dosage on juice qualities based on two main parameters; type of juice and ozone treatment time (0 to 30 minutes). The treated samples were analyzed for total soluble solid (TSS), pH, turbidity, total color difference (TCD), pectin methyl esterase (PME) activity, ascorbic acid content, total phenolic content (TPC) and DPPH radical scavenging activity. Based on the findings, it was observed that the variety of juice sample has a significant effect on pH (p < 0.0001), TSS (p < 0.0001) and TCD (p < 0.0001). While ozone treatment time was significant on turbidity (p < 0.0001) and PME (p < 0.0001). The two factors interaction solely affect on ascorbic acid content significantly (p < 0.0001) and TPC (p < 0.0001). In conclusion, ozone treatment of orange, lemon and lime juice have shown significant effects on physicochemical and antioxidant properties. However, the study have found lemon juice can retain most of its antioxidant activities (DPPH; 98.9%, TPC; 96%, AA; 86.7%) after 10 minutes ozone treatment time at 17 ppm

Item Type:	Project Paper
Faculty:	Faculty of Engineering
Depositing User:	Ms. AZLINA ZAINAL ABIDIN
Date Deposited:	01 Nov 2022 07:31
Last Modified:	10 Nov 2022 07:35
URI:	http://psaspb.upm.edu.my/id/eprint/548

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