Journal
JOURNAL OF ANALYTICAL CHEMISTRY
Volume 60, Issue 3, Pages 234-239Publisher
MAIK NAUKA/INTERPERIODICA
DOI: 10.1007/s10809-005-0077-y
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A new class of chelating polymer adsorbents was synthesized on the basis of aminopolystyrene azo compounds and various para-substituted anilines. Physicochemical and analytical properties of adsorbents and their ionic associates with the [AuCl4](-) anion were studied. Correlations between the ionization constants of amino group (pK(NH2)) and the Hammett electronic constant (sigma(n)) were found. A linear correlation between the charge on the amino group nitrogen atom and the (sigma(n)) value was revealed on the basis of the results of quantum-chemical calculations. A sorption-spectroscopic method was developed for determining gold in ores and rocks. The method was verified by analyzing certified reference samples of ores and rocks in the gold concentration range between n x 10(-3) and n x 10(-6)%, RSD = 5%.
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