Simultaneous second derivative spectrophotometric determination of copper(n) and nickel(II) using 1-phenyl-1,2-propanedione-2-oxime thiosemicarbazone

Oil Technological Research Institute, JNTU, Anantapur-515 001, Andhra Pradesh, India Department of Chemistry, Sri Krishnadevaraya University, Anantapur-515 003, Andhra Pradesh, India Manuscript received 17 August 2006, revised 27 February 2007, accepted 12 March 2007 The reagent, l-phenyl-1,2-propancdione-2-oxime lhiosemicarbazone (PPDOT) has been used for the determination of CuII and NiII by spectrophotometric method. Second derivative methods have been developed for the determination of Cull and NiII using PPDOT when they are present alone. Simultaneous determination of Cull and NiII in synthetic mixtures was carried out by measuring the amplitude at 482.5 and 441 nm respectively without the need for employing simultaneous equation