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Differential pulse voltammetric determination of fenobucarb at the glassy carbon electrode, after its alkaline hydrolysis to a phenolic product
Author(s) -
Cabanillas Agustina Guiberteau,
Díaz Teresa Galeano,
Salinas Francisco,
Ortiz Juan Manuel,
Kauffmann Jean Michel
Publication year - 1997
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.1140091218
Subject(s) - detection limit , chemistry , alkaline hydrolysis , glassy carbon , differential pulse voltammetry , hydrolysis , pulse (music) , electrode , carbon fibers , analytical chemistry (journal) , electrochemistry , chromatography , cyclic voltammetry , materials science , organic chemistry , voltage , physics , quantum mechanics , composite material , composite number
Abstract A differential pulse voltammetric method for the determination of fenobucarb is proposed. This N ‐methylcarbamate pesticide is hydrolyzed in alkaline medium (0.02 M NaOH during ten min), and the resulting product 2‐ sec ‐butylphenol is oxidized at the glassy carbon electrode giving rise to a peak at a potential near 750 mV (pH 3.5). The linear relationship between I p and fenobucarb concentration was established up to 1.00 × 10 −4 M concentration, the detection limit was 3.68 × 10 −6 M. The RSD is 3.74% for a 1.0 × 10 −5 M concentration ( n = 11, p = 0.05). The method has been satisfactorily applied to the analysis of water samples spiked with the pesticide.