Author(s): S. Mukherjee, S. Mukherjee, A. Kundu, G. K. Das and A. Bhattacharyya

Abstract: A simple, fast and inexpensive analytical method was developed and validated for screening of Fluroxypyr-Meptyl, a selective post-emergent systemic broadleaf herbicide in onion (plant leaf, bulb) and soil using GC-MS/MS. The method comprised of extraction with ethyl acetate using matrix solid phase dispersion method followed by column chromatographic and dispersive solid phase extraction cleanup and quantified in GC-MS/MS. The method was validated in concentration ranging from 0.02-0.1 µg g-1. The recovery of Fluroxypyr-Meptyl in onion (all substrates) and soil was ranging from 88-98% at different levels of analytes with RSD (HorRat< 0.51) of 8-15%. The global uncertainty was calculated at 0.02 µg g-1. In order to evaluate in safety use in India and degradation kinetics, a field study was conducted following the validated method........

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