Effect of ozone, lactic acid and combination treatments on the control of microbial and pesticide contaminants of fresh vegetables.

Saranya, Pounraj and Tanmayee, Bhilwadikar and Manivannan, S. and Rastogi, N. K. and Negi, P. S. (2021) Effect of ozone, lactic acid and combination treatments on the control of microbial and pesticide contaminants of fresh vegetables. Journal of the Science of Food and Agriculture, 101. pp. 3422-3428. ISSN 0022-5142

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Abstract

BACKGROUND: Fruit and vegetable consumption has increased due to their tremendous health benefits. However, recent studies have shown that contaminated products may serve as vehicles for foodborne pathogens and harmful chemicals. Therefore, fresh vegetables must be decontaminated before consumption to ensure food safety. RESULTS: In this study, the combined decontamination treatment of lactic acid (2.5 mL L−1) and ozone (9 mg L−1) for 10 min showed better efficacy in the removal of contaminants from fresh vegetables as compared to individual treatments. The combined treatment resulted in a reduction of 1.5–3.5 log CFU of native mesophilic bacteria per gram and 1.6–2.9 log CFU of artificially inoculated Escherichia coli per gram from tomato, cucumber, carrot and lettuce. The combined treatment also removed spiked pesticides, which represent artificial chemical contamination (28–97% chlorpyrifos and 62–100% -cyhalothrin residues), from fresh vegetables. No significant difference (P > 0.05) in various sensory attributes of vegetables was observed between untreated and treated (lactic acid and ozone) vegetables. CONCLUSIONS: The combination treatment provides a novel approach to target two groups of contaminants using a single procedure. The combination treatment can be used as an alternative to currently used decontamination techniques for the supply of safe vegetables to consumers.

Item Type:	Article
Uncontrolled Keywords:	carrot; cucumber; lettuce; natural microbiota; pesticide residues; tomato
Subjects:	500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 26 Pesticide Chemistry 600 Technology > 08 Food technology > 23 Vegetables
Divisions:	Food Engineering Food Protectants and Infestation Control Fruit and Vegetable Technology
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	14 Jul 2021 10:29
Last Modified:	14 Jul 2021 10:29
URI:	http://ir.cftri.res.in/id/eprint/14890

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