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Title: Spectrophotometric study of the complexation equilibria of cobalt(II) with 4-(5′-methyl-3′-isoxazolylazo)-resorcinol and determination of cobalt(II)
Authors: Sosa, Z. 
Pérez Trujillo, J. P.
Arias, J. J.
García Montelongo, F.
UNESCO Clasification: 2301 química analítica
Issue Date: 1987
Publisher: 0277-5387
Journal: Polyhedron 
Abstract: The reaction of cobalt(II) with 4-(5′-methyl-3′-isoxazolylazo)-resorcinol (MIAR) in 4% v/v ethanol-water medium at I = 0.1 M (NaClO4) was investigated spectrophotometrically. Graphical and numerical calculation methods were used to establish the equilibria in solution and to evaluate the stability constant of the complexes formed (log β101 = 7.48±0.06, log β111 = 12.77 max 12.99, log β102 = 16.41±0.07). The optimum conditions for the spectrophotometric determination of Co(II) with MIAR were established and the method applied to its determination in some low alloy steels and hydrofining catalysts.
ISSN: 0277-5387
DOI: 10.1016/S0277-5387(00)84537-4
Source: Polyhedron [ISSN 0277-5387], v. 6, p. 1993-1997
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