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Aqueous ozone solutions for pesticide removal from potatoes

2016; SAGE Publishing; Volume: 22; Issue: 8 Linguagem: Inglês

10.1177/1082013216651179

1532-1738

Fernanda Fernandes Heleno, Maria Eliana LR de Queiroz, L. R. D. Faroni, Antônio Augusto Neves, André Fernando de Oliveira, Luiz P. Costa, Gustavo Gonçalves Pimenta,

Water Quality Monitoring and Analysis

The presence of pesticide residues in potatoes is of concern because of the potential impact to human health due to the high consumption of this vegetable. In this study, aqueous solutions with and without ozone saturation as postharvest wash treatment at pH 4.0, 7.0, and 9.0 were tested to remove chlorothalonil from potatoes. The method used for pesticide analysis has been validated, presenting recovery values of 94–103%, with variations in the repeatability coefficients of ≤10.6%, and a quantification limit of 0.05 mg kg −1 . Regardless of pH, treatment with aqueous ozone solutions removed 70–76% of the pesticide present in the potato. In the no-ozone treatments, the percentage average removal of chlorothalonil residues in potatoes was only 36%. Over 24 days of storage, the quality of potatoes washed with aqueous ozone solutions was not significantly different from those washed with pure water.