Premium
Solvent Extraction Separation of Gold with Cyanex 302 as Extractant
Author(s) -
Sarkar Sunil G.,
Dhadke Puroshattam M.
Publication year - 2000
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200000117
Subject(s) - chemistry , hydrochloric acid , extraction (chemistry) , toluene , chloride , relative standard deviation , aqueous solution , solvent extraction , aqueous two phase system , chromatography , solvent , nuclear chemistry , detection limit , inorganic chemistry , organic chemistry
A method has been developed for the extraction of gold(III) from hydrochloric solution with Cyanex 302 dissolved in toluene. The extraction was quantitative from 0.005‐8.0 M HCl with 7.5 × 10 −4 M Cyanex 302 and an equilibrium period of 3.0 min. Gold(III) from the non‐aqueous phase was stripped with 0.1 MNa 2 S 2 O 3 and determined spectrophotometrically at 400 nm using stannous chloride method. The method is useful for separation of Au(III) from Cu(II), Ni(II), Pd(II), Pt(IV)and Fe(III) and was extended for the determination of Au(III) in Ayurvedic drug samples. The method is reproducible with a relative standard deviation of ± 1.0%.