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- [3] EXTRACTION OF ANTIMONY AND BISMUTH WITH PYROCATECHOL VIOLET AND TRIDODECYLETHYLAMMONIUM BROMIDE ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1979, (APR): : 120 - 120
- [9] EXTRACTION OF NIOBIUM DIFFERENT LIGAND COMPLEX WITH PYROCATECHOL VIOLET, PYRIDINE AND POTASSIUM BROMIDE UKRAINSKII KHIMICHESKII ZHURNAL, 1973, 39 (10): : 1053 - 1055