ANALYSIS OF TRACE METALS IN RIVER TUNGA OF KARNATAKA BY DIFFERENTIAL PULSE ANODIC STRIPPING VOLTAMETRY (DPASV)

摘要

Water samples from river Tunga were collected between June 2004 and May 2005 and analyzed for the presence of zinc (Zn), copper (Cu), lead (Pb), cadmium (Cd), nickel (Ni) and cobalt (Co) by Differential Pulse Anodic Stripping Voltametric (DPASV) method. DPASV can be efficiently used for simultaneous determination of trace metal ions in trace as well as ultra trace levels. Ammonium acetate buffer as a supporting electrolyte at pH 2.25 is an excellent method for determination of Cu, Pb, Cd and Zn, and NH_4/NH_4Cl as a supporting electrolyte at pH 9.2 is for the determination of Co and Ni content in river water samples. The study reveals that all the trace metals are well within the maximum permissible limits, however, check should be kept on the anthropogenic inputs to restore the quality of this valuable natural resource.