Separation of gallium and indium from ores matrix by sorption on Amberlite XAD-2 coated with PAN.
A chelating sorbent obtained by adsorption of 1-(2-pyridylazo)-2-naphthol (PAN) on Amberlite XAD-2 was used for the preconcentration of Ga and In. The analytical characteristics of the chelating sorbent were investigated and optimun sorption conditions for these metals under dynamic conditions were established. A peristaltic pump is used to adjust the flow rate of the solution. Elements are collected from the column by using a mixture adjusted to a pH range of 4-7 and 6-12 by ammonia or ammonium chloride for Ga and In, respectively. The procedure developed was applied to the analysis of different ores.
Bermejo-Barrera
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P
Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, University of Santiago de Compostela, 15706, Santiago de Compostela, Spain. qn1956@usc.es
Martínez-Alfonso
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N
Bermejo-Barrera
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A