Abstrato

Analysis Of Fenitrothion Using Novel Reagent In Water Samples By Spectrophotometry

P.Chiranjeevi, P.Subrahmanyam, B.Krishnapriya, G.Ravindranath Reddy, B.Jayaraj

A novel spectrophotometric method was developed for the determination of fenitrothion in its formulations, water samples with newly synthesised reagent. The method was based on the alkaline hydrolysis of fenitrothion pesticide and resultant hydrolysed product of fenitrothion was coupled with diazotised 4,4-methylene-bis-o-hydroxy aniline in basic medium to give purple coloured product having max 552 nm. The formation of coloured derivative with the coupling agent is instantaneous and stable for 5 days. Beer’s law was obeyed in the concentration range of 0.5-18.0 g ml-1. The proposed method is sensitive, easy to operate and permitted the determination of fenitrothion with a detection limits of 0.026 g ml-1. The experimental results indicate that the procedure can eliminate the fundamental interferences caused by other pesticides and non-target ions, which made this method is more sensitive and selective. Performance of the proposed method was compared statistically in terms Student’s F and t-tests with the reported method.