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Determination of Dissolved Zn(II) and Cd(II) in Estuarine Water by Using a Bismuth Film Microelectrode
Author(s) -
de Souza Ana P. R.,
Salles Maiara O.,
Braga Elisabete S.,
Bertotti Mauro
Publication year - 2011
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.201100093
Subject(s) - microelectrode , bismuth , analytical chemistry (journal) , anodic stripping voltammetry , copper , electrode , chemistry , detection limit , zinc , metal , certified reference materials , materials science , electrochemistry , metallurgy , chromatography
A bismuth‐film electrode was employed to quantify Cd(II) and Zn(II) in estuarine water samples by anodic stripping voltammetry. The bismuth film was deposited in situ simultaneously with the analytes onto a carbon fibre disc microelectrode (radius=3 µm). Under the optimised conditions, calibration plots for both metallic ions were obtained in the range from 0.5 to 10.0 nmol L −1 and the limits of detection for Cd(II) and Zn(II) were estimated as 0.03 and 0.8 nmol L −1 , respectively. The accuracy of the results supplied by the bismuth film microelectrode (BiFME) was assessed by performing addition‐recovery experiments and by comparing values with those obtained with a certified sample. The usefulness of the methodology was demonstrated by applying the BiFME to measuring the Cd(II) and Zn(II) content in estuarine water.