Determination of azinphos-ethyl insecticide by adsorptive stripping voltammetry on the hanging mercury-drop electrode |
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Authors: | G Erdo?du |
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Institution: | (1) Department of Chemistry, Faculty of Arts and Sciences, Inonu University, 44069 Malatya, Turkey |
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Abstract: | The electrochemical characteristics of azinphos-ethyl (APE) have been determined by means of electrochemical techniques such
as cyclic voltammetry (CV) and adsorptive stripping voltammetry (ASV) at a hanging mercury drop electrode (HMDE) over a wide
range of pH from 2.0 to 8.0. The cyclic voltammograms demonstrate the adsorption of this compound at the mercury electrode.
A systematic study of the various operational parameters that affect the stripping response was carried out by differential
pulse voltammetry (DPV). With a preconcentration potential of −0.6 V and a 60 s preconcentration time, the limit of detection
was 5.42 × 10−9 M, and the relative standard deviation (n = 5) was 2.7 % at concentration level of 6.45 × 10−7 M APE. The degree of interference from diverse ions and some other pesticides on the differential pulse stripping signal
for APE was evaluated. Finally, the method was applied to the determination of APM in spiked soil, tap water, and treated
wastewater.
The text was submitted by the author in English. |
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