This Feature summarizes recent works in paper-based
potentiometry
and voltammetry in heavy metal determination. Interactions of paper
substrates with heavy metals, influence on the sensing response, and
modification methods applied to paper substrates to improve the performance
of recently developed electrochemical sensors are discussed. Since
the rekindling of interest in paper-based analytical devices, methodologies
and electrode designs for heavy metal determinations are highlighted.
Promising aspects of the use of these sensors for samples containing
solids and the increased versatility of the use of paper in analytics
offers the possibility of increased acceptance of these low-cost platforms.
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