Detection of flonicamid insecticide in vegetable samples by UV–Visible spectrophotometer and FTIR

Abstract

In the present study, the synthesis of 4,4′-((4-dimethylamino)cyclohexane-2,5-vinylidene)methylene))bis-(N, N-dimethylaniline) violet color dye by the hydrolyzed of Flonicamid in basic medium (OH−) followed by bromination and leucocrystal violet, as well as the synthesis of violet crystal by environmental samples (i.e., cucumber, tomato, bottle gourd, soil, and water). Characterization for the synthesis of violet crystal dye by using UV–Vis spectrophotometer and FTIR methods. As a result, the UV–Vis absorption spectrum was observed at 580 nm. The limit of detection and limit of quantification was observed at 0.007 μg mL−1 and 0.025 μg mL−1 respectively. We have also conformational studied the functional group (such as an NH symmetric band are 1654.85 cm−1, symmetrical stretching CN is 1417.46 cm−1, NH and CN band 1321.34 cm−1, CC stretching is 1035.81 cm−1, a carbonyl group is 785.61 cm−1) involved in the complexation between flonicamid and bromination by FTIR method. This system has been successfully applied for the detection of flonicamid in various environmental sample i.e., cucumber, tomato, bottle gourd, soil, and water. This method advances in simple, selective, and rapid as well as economic for the determination of flonicamid insecticide in vegetable and fruit samples.