Author/Authors :
Yugandhar Sreedhar، Neelam نويسنده Electroanalytical Lab, Department of Chemistry, Sri Venkateswara University, Tirupati- 517502, Andhra Pradesh, India Yugandhar Sreedhar, Neelam , Sunil Kumar، Marella نويسنده Electroanalytical Lab, Department of Chemistry, Sri Venkateswara University, Tirupati- 517502, Andhra Pradesh, India Sunil Kumar, Marella
Abstract :
A highly sensitive voltammetric method was developed for the determination of
parathion in biological samples using sulphonatedpolyaniline modified glassy carbon
electrode. The modified electrode was electrochemically fabricated by cyclic voltammetric
method. Electrochemical reduction of parathion at modified electrode was investigated by
cyclic voltammetry and differential pulse voltammetry. The instrumental parameters and
reaction conditions were optimized for the development of stripping voltammetric procedure
for the determination of parathion. A linear relationship was found between the peak current
due to the reduction of nitro group to hydroxylamine and parathion concentration over the
range from 1.0×10-8 to 2.0×10-5 M with detection limits of 1.5×10-9 M. The applicability of
the proposed method was demonstrated by the determination of parathion in spiked human
urine samples
