Overview
Pokpas and colleagues developed a Nafion-graphene dimethylglyoxime modified glassy carbon electrode for selective nickel(II) detection in water by adsorptive cathodic stripping voltammetry. Cobalt appears in this paper as a common interfering ion tested during sensor selectivity validation at 200 µg/L; it is not a target analyte and no cobalt concentrations in environmental or food samples are reported.
This source is filed for completeness as a deposit item. It does not contribute to cobalt occurrence evidence in food or personal care product matrices.
Key numbers
Nickel LOD: 1.5 µg/L at 120 s accumulation time. Nickel linear range: 2 to 20 µg/L. Cobalt and zinc tested as interferents at 200 µg/L; sensor showed good selectivity for Ni2+ at 10-fold molar excess of Co2+ and Zn2+. Tap water validation at University of Western Cape, South Africa.
Implications for the wiki
None for cobalt food occurrence or toxicology. This paper is an analytical chemistry study confirming cobalt as a known electrochemical interferent in nickel stripping analysis. It has no food-safety content. It may be relevant as a method reference if nickel testing methodology in water matrices is developed on this wiki.
Related evidence
Update history
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