Monday , 24 June 2024

Electrochemical Investigation of carbonyl group containing pesticide monalide in water samples by using differential pulse adsorptive stripping voltammetry

ABOUT AUTHOR
S. Rajasekhar Reddy*,T. Raveendranath babu, B. Sreenivasulu
Electro Analytical Lab, Department of chemistry,
N.B.K.R Science and Arts College,Vidyangar, AP, INDIA
E-mail : [email protected]

ABSTRACT
In this investigation electrochemical  behavior of carbonyl group containing pesticide monalide is studied and its residues in water samples  is determined by using differential pulse adsorptive stripping voltammetry . In this investigation  hanging mercury droop electrode  is used as working electrode  and universal buffer with pH range 4.0-6.0  is used as supporting electrolyte. Investigated compound was found to exhibit well defined peak at pH 5.0. Peak currents were linear over the concentration range of 1.0x 10-5 M to 1.0×10-10 M with lower detection limit of 1.09x 10-10 M. The relative standard deviation and correlation coefficients were found to be 1.15%, 0.998 respectively for 10 replicates. Calculations made by standard addition method.
Key words: Differential Pulse Adsorptive Stripping Voltammetry, universal buffer, hanging mercury droop electrode, water samples
INTRODUCTION
Carbonyl group containing pesticides are playing vital role in the agriculture field. These pesticides are widely used as pre  and post  emergent weed control agents (herbicides) for a wide variety of crops, namely corn, sorghum, wheat, rice, sugar cane and for fruits, vegetables and wine yards, consequently, they are found inriver water. Monalide (4′-chloro-2,2-dimethyl valeranilide) (C13H18ClNO) is  several analytical methods were used for the determination of traces of  monalide in different matrices that is in biological and environmental. William C. Steen and Timothy w. collette determined Microbial Degradation of Seven Amides by Suspended Bacterial Populations byusing chromatographic techniques. Khizar hayat1et al.determined pesticide residues in blood samples of villagers involved in pesticide application at District Vehari (Punjab), Pakistan by using gas chromatography. Guo-Fang Pang , determined 405 pesticide residues in grain by accelerated solvent extraction then gas chromatography-mass spectrometry or liquid chromatography-tandem mass spectrometry. But there is no voltammetric method in literature cited above so in the present article a selective and sensitive DP-ASV method were reported.

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