Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi-110 012, India
Online published on 3 November, 2011.
An analytical method has been developed to determine active ingredient (a.i.) of lambda-cyhalothrin and fenpropathrin in emulsifiable concentrate formulations. The formulations were cleaned-up by preparative thin layer chromatography and the a.i. estimated by measuring the ester carbonyl absorption in the infrared spectrum. Recoveries from commercial and laboratory prepared formulations were 87–93% in both the pyrethroids. The validity of FT-IR method was confirmed by comparing the results with standard HPLC method.
Lambda-cyhalothrin, fenpropathrin, emulsifiable concentrate formulation, estimation, FT-IR spectroscopy
