title: Spectrophotometric determination of bismuth in pharmaceutical preparations using 1-[di(2-pyridyl)--methylene]-5-salicylidene-thiocarbonohydrazide.
abstract: A simple and fast spectrophotometric method for the determination of bismuth in pharmaceutical preparations is described. The used chromatic reactive is 1-[di(2-pyridyl)methylene]-5-salicilydene-thiocarbonohydrazide+ ++ forming a yellow complex with bismuth. In a solution containing 40% v/v of dimethylformamide molar absorption is 5.7 x 10(4) l.mol-1.cm-1 at 421 nm and at pH 4.3. The optimal conditions for the color development and the possible interferences are studied.
authors: Department of Analytical Chemistry, Faculty of Pharmacy, University of Seville, Spain.
authors: M T
authors: MT
authors: Morales
authors: M T
authors: MT
authors: Montaña
authors: G
authors: G
authors: Galan
authors: J L
authors: JL
authors: Gomez Ariza
mesh_terms: D001729:Bismuth / Q000032:analysis*; D055598:Chemical Phenomena; D002621:Chemistry; D004126:Dimethylformamide / Q000032:analysis; D006834:Hydrazines; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D011725:Pyridines; D013053:Spectrophotometry
chemical_list: D006834:Hydrazines; D007202:Indicators and Reagents; D011725:Pyridines; C066715:1-(di-(2-pyridyl)methylene)-5-salicylidenethiocarbonohydrazide; D004126:Dimethylformamide; D001729:Bismuth