This paper builds an electrochemical sensor from graphite recovered from spent zinc-carbon batteries, coated with bismuth nanoparticles, carbon nanotubes and Nafion, and uses it to measure lead and cadmium in herbal food supplements by anodic stripping voltammetry. Bismuth is the electrode coating, not the analyte, so the paper contains no information on bismuth in the supplements.
Key numbers
This paper reports no numerical findings relevant to bismuth exposure.
Methods (brief)
The modified electrodes were prepared by drop coating and optimized for anodic stripping voltammetry. The authors report a linear range of 5 to 1000 ppb and detection limits of 1.06 ppb for cadmium and 0.72 ppb for lead, and compared supplement results with atomic absorption spectroscopy (abstract).
Evidence fitness
This is a materials or analytical chemistry paper in which bismuth is a component of an engineered material. It does not support dietary exposure or toxicity claims for bismuth, and no bismuth was measured in food, water, feed, soil or human or animal tissue.
Limitations
Lead and cadmium results in supplements are outside the scope of this bismuth page. The paper does not test whether bismuth from the electrode coating transfers to samples.
Related evidence
Update history
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