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Imprinted Polymer – Modified Hanging Mercury Drop Electrode for Differential Pulse Adsorptive Stripping Voltammetric Analysis of a Diquat Herbicide
Author(s) -
Prasad Bhim Bali,
Arora Bhavana
Publication year - 2003
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200390010
Subject(s) - diquat , chemistry , hanging mercury drop electrode , polarography , detection limit , cathodic stripping voltammetry , dropping mercury electrode , supporting electrolyte , adsorptive stripping voltammetry , mercury (programming language) , electrode , stripping (fiber) , analytical chemistry (journal) , electrolyte , chromatography , voltammetry , electrochemistry , inorganic chemistry , materials science , paraquat , computer science , programming language , biochemistry , composite material
An imprinted polymer modified hanging mercury drop electrode (HMDE) in Model 303A system in conjunction with a PAR Model 264A Polarographic Analyzer/Stripping Voltammeter has been used for the selective analysis of a diquat herbicide viz., 5,6‐dihydropyrazino[1,2,3,4‐[lmn]‐1,10‐phenanthrolinium dichlorides in differential pulse cathodic stripping voltammetry mode. Complex aqueous samples (drinking water and agricultural soil suspension), spiked with a diquat herbicide, were directly analyzed by the adsorptive accumulation of the analyte over the working electrode (accumulation potential −0.8 V (vs. Ag/AgCl), accumulation time 120 s, pH 7.0, supporting electrolyte 0.1 M KCl, scan rate 10 mV s −1 , pulse amplitude 25 mV). The limit of detection for diquat herbicide was found to be 0.34 nmol L −1 (0.1 ppb, RSD 2%, S / N =2).