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- W343397170 abstract "Excessive presence of heavy metals in environment affects plants and fruits grown in the contaminated area. Rapid on-site monitoring of heavy metals can provide useful information for efficiently characterizing heavy metal-contaminated sites and for minimizing the exposure of the contaminated food crops to humans. This study reports on the evaluation of gold and glassy carbon (GC) electrodes with mercury or bismuth as a coating material for simultaneous determination of cadmium (Cd) and lead (Pb) in 0.1 M <TEX>$HNO_3$</TEX> solution by anodic stripping voltammetry (ASV). The use of a square-wave voltammetric potential between a working electrode and a reference electrode caused Cd and Pb ions deposited on the electrode surface to be oxidized, thereby generating electric currents at different potentials. The mercury-coated gold electrode was not sensitive enough to detect the usable range of Cd concentrations (1 to 100 ppb). The GC electrodes with mercury or bismuth displayed well-defined, sharp and separate current peaks for Cd and Pb ions when the square-wave voltammetric potentials were applied. The peak currents measured with both mercury- and bismuth- coated GC electrodes were linearly proportional to Cd and Pb concentrations in the range of 1 to 200 ppb in 0.1 M <TEX>$HNO_3$</TEX> with strong linear relationships between concentration and peak current (<TEX>$R^2$</TEX> > 0.95), indicating that both of Cd and Pb ions could be quantitatively measured." @default.
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- W343397170 date "2008-12-25" @default.
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- W343397170 title "Study on Electrode Selection for Electrochemical Detection of Cadmium and Lead" @default.
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- W343397170 doi "https://doi.org/10.5307/jbe.2008.33.6.404" @default.
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