electrodeposition, carbon paste electrode,mercury,clay minerals, anodic stripping voltammetry

A new type of carbon paste electrode modified with clay mineral and covered with a mercury film is presented in this work. Electrodeposition of the mercury film was performed on the carbon paste electrode modified with montmorillonite. The mercury film was deposited by both electrodeposition "in situ" and a preliminary electrodeposition. The pre-deposited film of mercury showed to be a suitable for anodic stripping voltammetry. An open-circuit sorption of Cd, Pb and Cu with subsequent anodic stripping voltammetry exhibited higher current responses of metals. Besides the enhanced sensitivity more perfect separation of the current responses during a simultaneous stripping of metals is expected to be achieved by means of the electrode.

A new type of carbon paste electrode modified with clay mineral and covered with a mercury film is presented in this work. Electrodeposition of the mercury film was performed on the carbon paste electrode modified with montmorillonite. The mercury film was deposited by both electrodeposition "in situ" and a preliminary electrodeposition. The pre-deposited film of mercury showed to be a suitable for anodic stripping voltammetry. An open-circuit sorption of Cd, Pb and Cu with subsequent anodic stripping voltammetry exhibited higher current responses of metals. Besides the enhanced sensitivity more perfect separation of the current responses during a simultaneous stripping of metals is expected to be achieved by means of the electrode.