IN-SITU DETERMINATION OF DISSOLVED METALL IC-IONS BY CHANNEL FLOW ELECTRODE WITH SPECTROPHOTOMETRY

UV/visible specrtophotometry has been employed for the detection of io ns emitted from the working electrode in channel flow electrode system . Using ferrocyanide solution, the absorbance of ferricyanide emitted from the working electrode was measured at the downstream of the worki ng electrode. The absorbance (Abs.) has the following relations with t he electrolyte flow rate (V-m) and the flux of generated species (psi) : Abs. proportional to phi . V-m(-2/3) in the lamminar flow condition , Abs. proportional to phi . V m(-1) in the turbulent flow condition. The present method was applied to the investigation of Al dissolution, and in situ detection of dissolved Al (III) was done.