Persistence, dissipation and GC-MS analysis of Tebuconazole residues in/on Cabbage Yadav Rajbir, Sharma K.K., Maitra Jaya1 Project Coordinating Cell, Pesticide Residue Laboratory, All India Network Project on Pesticide Residue, ICAR-I.A.R.I., New Delhi-110 012 1Department of Applied Chemistry, School of Vocational Studies and Applied Science, Gautam Buddha University, Greater Noida-201 310 (UP), India Online published on 9 August, 2019. Abstract The fungicide, tebuconazole was applied at recommended (258 g a.i./ha) and double the recommended (516 g a.i./ha) dose on cabbage. The fungicide residues in/on cabbage head and soil were periodically analysed using gas chromatography-mass spectrometry (GC-MS). The analytical method was validated for quantifying the residues of tebuconazole in cabbage, with regression coefficient (R2) of 0.999, the method displayed excellent linearity over a concentration range 0.05–1 mg kg−1. Limit of determination (LOD) and limit of quantification (LOQ) of the method were 0.01 and 0.05 mg kg−1, respectively. Percentage recovery of tebuconazole spiked at three fortification levels in cabbage and soil ranged from 88% to 100%. On the basis of persistence and dissipation studies, the half-life (t1/2) of tebuconazole on cabbage was 1 day and 1.2 days for the recommended and double the recommended dose, respectively. The residue levels in soil samples collected after 25 days of last application were below the quantification limit of 0.05 mg kg−1. Top Keywords Brassica oleracea var. capitata, Dissipation, GC-MS, Tebuconazole. Top |