P. Kula et Z. Navratilova, Anion exchange of gold chloro complexes on carbon paste electrode modifiedwith montmorillonite for determination of gold in pharmaceuticals, ELECTROANAL, 13(8-9), 2001, pp. 795-798
Anion exchange of tetrachloroaurates on carbon paste electrode modified wit
h montmorillonite was studied in dependence on pH and concentration of chlo
rides in a sorption medium. Anion sorption of [AuCl4](-) was used as a prec
oncentration step to the determination of gold in a pharmaceutial preparati
on. First investigation of a possibility to use this method to determinatio
n of gold in blood serum was performed. The limit of determination of 8.12
x 10(-7) mol/L gold in a sample simulating an inorganic part of serum can b
e achieved.