Abstract
Diffuse reflection spectroscopy has been used for the direct determination of nickel traces after preconcentration on cellulose (Cel). The experimental 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 dimethylglyoxime (DG) and benzyldioxime (BD) have been optimized. Diffuse reflection coefficient and chromaticity characteristics of the nickel sorbates indicated the same dependence on studied factors, but their sensitivity is different. The linear relations of variations of these quantities with the nickel contents were determined. Detection limits were 0.1 μg/mL and 0.2 μg/mL for BD and DG, respectively. The procedures were used for the analysis of natural and waste waters.
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