Direct determination of nickel traces on modified cellulose by diffuse reflection spectroscopy and using chromaticity characteristics |
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| Authors: | N I Ershova and V M Ivanov |
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| Institution: | (1) Moscow State Institute of Radiotechnology, Electronics and Automatics, Vernadsky Prospect, 78, Moscow 117454, Russian Federation, RU;(2) Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, Vorobjevi Gory, Moscow 119899, Russian Federation, RU |
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| 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.
Received: 30 July 1998 / Revised: 4 November 1998 / Accepted: 7 November 1998 |
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