EFFECT OF UV-RADIATION ON METHOMYL, OXAMYL AND CARBOSULFAN RESIDUES IN TOMATO JUICE

摘要

This study was conducted to study the effect of UV-radiation at 254 nm on methomyl, oxamyl and carbosulfan residues of spiked tomato juice. In a previous study on carbamate pesticide residues in tomato juice, the same authors found that most of the tomato juice samples contained methomyl residues (less than the maximum residue limits according to EU-pesticides MRL), while oxamyl and carbosulfan residues were not detected in any of the tested tomato juice samples. However, the reduction percentages of methomyl, oxamyl and carbosulfan after UV-radiation treatment for 30 min were 19.59, 16.82 and 2.16%, respectively. Moreover, the reduction percentages of the studied carbamate residues increased with increasing time of exposure. UV-radiation slightly affected the oxamyl-spiked samples. Carbosulfan was found to be the most persistent pesticide when exposed to UV-radiation. Its reduction percentage did not go beyond 2.16% after 30 min.