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Spectrophotometric Determination Of Fenvalerate In Environmental Samples

P.Chiranjeevi, B.Jayaraj, K.Dakshayani, B.Krishnapriya, P.Subrahmanyam, D.Rekha, J.Dilip Kumar, P.Reddy prasad

A facile simple, sensitive, rapid and non-extractive spectrophotometric method was described for the determination of fenvalerate in its formulations, water and grain samples. The methods are based on the hydrolysis of fenvelarate with methanolic NaOH to form a 3-phenoxy benzaldehyde. The resultant aldehyde group was condensed with 4-chloro aniline in basic medium to give yellowish orange coloured product having λmax 482 nm. The formation of color derivative with the coupling agent is instantaneous and stable for 42 h Beer’s law was obeyed in the concentration range of 0.3-15.0 μg ml-1. The experimental results indicate that the procedure can eliminate the fundamental interferences caused by other pesticides and non-target ions, which made these methods more sensitive and selective. The method was applicable to the determination of fenvalerate residue in water and food grain samples up to ng level.