INVESTIGADORES
FERNANDEZ Liliana Patricia
artículos
Título:
SENSITIVE SPECTROPHOTOMETRIC DETERMINATION OF LANTHANUM WITH 2-(3,5-DICHLORO-2-PYRIDYLAZO)-5-DIMETHYLAMINOPHENOL.
Autor/es:
FERNANDEZ, LILIANA; OLSINA, ROBERTO
Revista:
ANALYTICAL SCIENCES
Editorial:
JAPAN SOC ANALYTICAL CHEMISTRY
Referencias:
Lugar: Tokyo; Año: 1990 vol. 6 p. 411 - 414
ISSN:
0910-6340
Resumen:
The reagent 2-(3,5-dichloro-2-pyridylazo)-5-dimethylaminophenol (3,5-diC1DMPAP) has been synthesized and its analytical properties investigated. This reagent can be used for the spectrophotometric determination of La(III) in concentrations ranging from 0.045 to 0.72 ppm. The reaction takes place at a pH between 9 and 10.8. In the presence of Triton X-100 this complex is soluble in water (~=1.45X1051 moM cm-1). The maximun tolerances for cations as well as for any anions were determined. In order to overcome difficulties caused by the presence of other lanthanides, an ion exchange chromatographic technique was used.
