Abstract
A multi-element post-column high-performance liquid chromatographic detector based on dithizone as a complex-forming reagent is described. The separation was achieved in aqueous media on a sulphonated 10% cross-linked polystyrene resin. Cadmium(II), cobalt(II), copper(II), lead(II), nickel(II) and zinc(II) ions were detected down to nanogram levels. Working ranges up to the microgram level were possible. The use of this heavy metal detector which may be tuned by pH control 1 is discussed. An advantage of the system for multi-element determinations is that the decrease in the dithizone absorbance at 590 nm is measured rather than increased absorbances at different wavelengths particular to each metal dithizonate.
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