Abstract
A sorption–spectrometric method was developed for the determination of palladium in solutions of complex composition using cellulose filters impregnated with trioctylamine with the subsequent formation of the colored compound of palladium with 4-(2-pyridylazo)resorcinol on the filter. It was demonstrated that conditions for the preconcentration of palladium coincide with conditions for the formation of colored compounds (green and red forms of palladium complexes) in the sorbent phase. The highest selectivity is observed for the formation of the green form; in this case, the determination of palladium is not affected by the interference from large amounts of concomitant elements (macrocomponents of ores). Palladium was determined on filters by diffuse reflectance spectrometry with the calculation of chromaticity characteristics and by a test scale. The detection limits were 0.5 (green form) and 0.3 (red form) μg of palladium on the filter. High precision of results of the determination of palladium (RSD < 5%) is attained in a wide range of its concentrations.
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Gordeeva, V.P., Kochelaeva, G.A., Tsizin, G.I. et al. Sorption–Spectrometric Determination of Palladium in Chloride Solutions. Journal of Analytical Chemistry 57, 688–693 (2002). https://doi.org/10.1023/A:1016817708070
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DOI: https://doi.org/10.1023/A:1016817708070