We demonstrate that in situ bismuth film modified screen printed electrodes may be used for the bio-monitoring of cadmium (II) in artificial and diluted human oral (saliva) fluid at the low mu g L-1 range The analytical protocol is based on anodic stripping voltammetry where the bismuth film provides enhanced sensitivity for the electroanalytical deposition of cadmium(II) coupled with a simple change in pH of the oral (saliva) fluid sample permitting quantitative measurements in an electrochemically challenging media.
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