Zobrazeno 1 - 10
of 18
pro vyhledávání: '"María Inés Toral"'
SENSITIVE KINETIC SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF DIPHENHYDRAMINE IN REAL SAMPLES
Autor:
Renato Saavedra, César Soto, Diego P. Oyarzún, María Inés Toral, Cristian Poza, David Contreras
Publikováno v:
Journal of the Chilean Chemical Society. 64:4507-4512
Kinetic spectrophotometry methods have levels of accuracy and sensitivity which are comparable to those of other methods and have been used in the quantification of different pharmaceutical analytes in different matrices. This work describes an indir
Autor:
Javier González-Navarrete, Marcela D. Urzúa, Mehrdad Yazdani-Pedram, Hernán E. Ríos, Angel Leiva, María Inés Toral, Ximena Briones-Olarán
Publikováno v:
Reactive and Functional Polymers. 109:112-119
Adsorption of As (V) by poly ( N -octyl-4-vinylpyridinium) bromide (P4VPyC8), used as solid phase, was studied. Determination of As (V) was carried out by direct measurement of the fluorescence intensity on the solid phase. Adsorption variables were
Publikováno v:
European Polymer Journal. 45:730-737
The ability of solid N -alkyl quaternized poly(4-vinylpyridine) with hexyl, octyl and decyl bromide for the retention of chromate and dichromate forms of Cr(VI) in aqueous solutions is studied. The retention of Cr(VI) was investigated by batch equili
Publikováno v:
Journal of AOAC INTERNATIONAL. 89:365-368
A rapid and simple continuous method for the extraction of nifedipine from tablets was developed by using pressurized hot water at 150C. This is the first time that subcritical water was applied to the extraction of low-polarity compounds in pharmace
Publikováno v:
JOURNAL OF AOAC INTERNATIONAL
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
A simple method has been developed for the simultaneous determination of N-butylscopolamine bromide and oxazepam in pharmaceutical formulations using first-order digital derivative spectrophotometry. Acetonitrile was selected as the solvent in which
Publikováno v:
Talanta. 50:183-191
A highly sensitive and selective second derivative spectrophotometric method has been developed for the determination of ruthenium and iron in mixtures. The method is based on the formation of the binary complexes of iron and ruthenium with 4,7-diphe
Publikováno v:
Scopus-Elsevier
This paper describes a method for the quantitative determination of aluminium in haemodialysis concentrates, based on the adsorption on a static mercury drop electrode of the Al-1,2 dihydroxyantraquinone-3-sulphonic acid complex. The signal was notab
Publikováno v:
Microchemical Journal. 48:221-228
Cobalt and iron can be determined simultaneously by first derivative spectrophotometry. The method does not require simultaneous equations to be resolved and it is based on the separation of the analytes, by liquid-liquid extraction, integrated react
Autor:
Claudia Almendares, María Inés Toral
Publikováno v:
Analytical Letters. 24:2263-2276
A sensitive method is described for the determination of microamounts of iron by means of its reaction at pH = 5.0 with 3-(4-phenyl-2-pyridinyl)-5-phenyl-1,2,4-triazine (PPT) and picrate (2,4,6-trinitro-phenol) and extraction into 1,2-dichloroethane.
Publikováno v:
TALANTA
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
An adsorptive stripping voltammetry method for the determination of iron has been developed. The procedure is based on the adsorptive collection of a complex of iron with 1-(2-piridylazo)-2-naphthol (PAN) on a bismuth-coated glassy carbon electrode (