Polarographic Determination of Lead(II) and Copper(II) using Phthalhydrazidylazo -2-naphthalenol-6-sulphonic Acid

Department of Chemistry, University of Calicut, Kerala-673 635 Manuscript received 17 May 1983, accepted 8 December 1983 Phthalhydrazidylazo-2-naphthalenol-6-sulphonic acid has been found to be a sensitive reagent for polarographic determination of lead(II) and copper(ll). Other common metal ions, though do not interfere, cause precipitation when present in large quantities. Very high tolerance of Zn2+ and alkaline earth metal ions has been observed in the determination of copper(II)