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.
Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, University of Santiago de Compostela, 15706, Santiago de Compostela, Spain. qn1956@usc.es
P
P
Bermejo-Barrera
N
N
Martínez-Alfonso
A
A
Bermejo-Barrera