Correlation between lead content in human biological fluids and the use of vitrified earthenware containers for foods and beverages

Relatively high levels of Pb can be readily consumed as part of our diet from ceramic glazed tableware containing Pb as part of the decorative pattern or glaze. Awareness of such problems has generated a demand for methods that are rapid, inexpensive, reproducible, sensitive and accurate. Electrochemical techniques such as anodic stripping voltammetry (ASV) offer a number of advantages both in terms of economics, sensitivity, portability and easy of use, requiring little more than an appropriate power supply for such applications. Coupled to these advantages, the technique of ASV can also be tailored to give a wide dynamic range from these extremely low levels to the ppm range, or higher. However, previously, ASV has suffered from the common use of Hg working electrodes, the use and subsequent disposal of which has lead to its lack of market penetration compared to other techniques. However, there are a growing number of reports in which Hg-free SPCEs with working electrodes in the micrometer (µm) range have been utilised, the radial diffusion inherent with these devices allows for analysis to be made without the need for forced convection. In this present study we have investigated the possibility of determining trace Pb concentrations at a screen-printed microband electrode (µBSPCE). This to our knowledge is the first report on the use of such microband electrodes for this application. In the first part of this study, we have used cyclic voltammetry to optimise the voltammetric conditions necessary to determine Pb at our µBSPCEs. In the second section, we then investigate the possibility of utilising these electrodes using anodic stripping voltammetry (ASV) for the determination of Pb in the leachates from glazed ceramic plates.

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Correlation between lead content in human biological fluids and the use of vitrified earthenware containers for foods and beverages

Cited by 4 publications

References 6 publications

The Persistent Contaminants: Lead, Mercury, Cadmium

The Persistent Contaminants: Lead, Mercury, Cadmium

Blood Lead in Uruguayan Children and Possible Sources of Exposure

The voltammetric behaviour of lead at a microband screen-printed carbon electrode and its determination in acetate leachates from glazed ceramic plates

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