Browsing by Author "f3c78c68-3731-4c4f-8f98-afd2a656969c"
Now showing items 1-6 of 6
-
Toral Ponce, María; Lara, Nelson; Gomez, Javier; Richter Duk, Pablo (Sociedad Chilena de Quimica, 2001)A microdetermination of iron at sub-μg/L level by derivative spectrophotometry has been developed. The compound TPTZ (2, 4, 6-tripyridyl-1, 3, 5-triazine) was used as chromogenic reagent to form a blue complex (pH = 5. 0), ...
-
Lara, Nelson; Aranda, Pilar; Ruiz, Ana I.; Manríquez, Víctor; Ruiz Hitzky, Eduardo (2012)This work reports a systematic study of the structural and electrical behavior of three ternary phases of the Ta xMo 1-xS 2 system (x = 0.55, 0.75 and 0.90) and their intercalation compounds resulting from both chemical ...
-
Toral Ponce, María; Lara, Nelson; Narváez, Jéssica; Richter Duk, Pablo (2004)A simple solid phase spectrophotometric method for both screening of eight transition metal ions plus lead and quantitative determination of copper, cadmium and zinc is described. The method is based on the preparation of ...
-
Toral Ponce, María; Richter Duk, Pablo; Lara, Nelson; Jaque, Pablo; Soto, Cesar; Saavedra, Marcela (1999)A direct and simple first derivative spectrophotometric method has been developed for the simultaneous determination of clidinium bromide and chlordiazepoxide in pharmaceutical formulations. Acetonitrile was used as solvent ...
-
Toral Ponce, María; Richter Duk, Pablo; Lara, Nelson; Escudero, M. Teresa; Soto, César (Marcel Dekker Inc., 2000)A second derivative spectrophotometric method has been developed for the determination of palladium and platinum in mixtures. The method is based on the formation of the platinum and palladium complexes with 3-(2- ...
-
Toral Ponce, María; Lara, Nelson; Tapia, A. Eugenia; Torres, Claudio; Richter Duk, Pablo (2002)A direct and simple second derivative digital spectrophometric method has been developed for the simultaneous determination of the sulfamethoxazole and trimethoprim in pharmaceutical formulation. A study of the spectral ...