Direct determination of nickel traces on modified cellulose by diffuse reflection spectroscopy and using chromaticity characteristics

Diffuse reflection spectroscopy has been used for the direct determination of nickel traces after preconcentration on cellulose (Cel). The experimenta l parameters (optical characteristics, acidity of aqueous solution, shaking time, volume of aqueous solution, nickel and tartaric ion concentrations, etc.) affecting sorption of nickel species with immobilized dimethylglyoxim e (DG) and benzyldioxime (BD) have been optimized. Diffuse reflection coeff icient and chromaticity characteristics of the nickel sorbates indicated th e same dependence on studied factors, but their sensitivity is different. T he linear relations of variations of these quantities with the nickel conte nts were determined. Detection limits were 0.1 mu g/mL and 0.2 mu g/mL for ED and DG, respectively. The procedures were used for the analysis of natur al and waste waters.