Abstract
Extractive separation, preconcentration, and determination of gold as an ion associate (IA) with 2-[2-(4-methoxyphenylamino)vinyl]-1,3,3-trimethyl-3H-indolium chloride in extracts by spectrophotometry and atomic absorption spectrometry were studied. The optimal conditions were found for the extraction of IA with aromatic hydrocarbons and acetate esters. The main chemical analytical properties of the ion associate were determined. The formation of IA enables extractive separation of gold from Al, Cr, Mn, Fe, Co, Ni, Zn, Cu, Cd, Pt, Hg, Bi, Ag, Pb, and Pd. By varying the volume ratio of the aqueous and organic phases in the range of (1–40): 1, one can combine extractive separation and the preconcentration of gold and decrease the detection limit for gold to 0.031 mg/L (extraction-spectrophotometric determination) or 0.084 μg/L (direct determination in extracts by electrothermal atomic absorption spectrometry). Procedures were developed for the determination of trace amounts of gold, and their performance characteristics were calculated.
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Original Russian Text © R. Serbin, Y.R. Bazel, V. Andruch, I.S. Balogh, 2011, published in Zhurnal Analiticheskoi Khimii, 2011, Vol. 66, No. 9, pp. 916–922.
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Serbin, R., Bazel, Y.R., Andruch, V. et al. Extractive separation, preconcentration, spectrophotometric and atomic absorption determination of gold as an ion associate with 2-[2-(4-methoxyphenylamino)vinyl]-1,3,3-trimethyl-3H-indolium chloride. J Anal Chem 66, 800–806 (2011). https://doi.org/10.1134/S1061934811070112
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DOI: https://doi.org/10.1134/S1061934811070112