Ceba, M R Spectrophotometric determination of trace amounts of iron(III) by extraction of the mixed-ligand iron-fluoride-purpurin complex. [electronic resource] - Talanta Feb 1982 - 142-4 p. digital Publication Type: Journal Article ISSN: 0039-9140 Standard No.: 10.1016/0039-9140(82)80038-6 doi