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Utilization of a Copper Solid Amalgam Electrode for the Analytical Determination of Atrazine
Author(s) -
De Souza Djenaine,
de Toledo Renata A.,
Mazo Luiz H.,
Machado Sergio A. S.
Publication year - 2005
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.200503331
Subject(s) - atrazine , detection limit , mercury (programming language) , copper , electrode , amalgam (chemistry) , relative standard deviation , environmental chemistry , chemistry , voltammetry , dropping mercury electrode , analytical chemistry (journal) , materials science , chromatography , electrochemistry , metallurgy , pesticide , computer science , agronomy , biology , programming language
A copper solid amalgam electrode was prepared and used for the voltammetric determination of atrazine in natural water samples by square wave voltammetry. This electrode is a convenient substitute for the hanging mercury electrode since it is selective, sensitive, reliable and inexpensive and presents low toxicity characteristic. The detection limit of atrazine obtained in pure water (laboratory samples) was shown to be lower than the maximum limit of residue established for natural water by the Brazilian Environmental Agency. The relative standard deviation for 10 different measurements was found to be only 3.98% in solutions containing 8.16×10 −6 mol L −1 of atrazine. In polluted stream water samples, the recovery measurements were approximately 70.00%, sustaining the applicability of the proposed methodology to the analysis of atrazine in such matrices.