Bismuth citrate in the quantification of inorganic phosphate and its utility in the determination of membrane-bound phosphatases

L. Cariani, L. Thomas, J. Brito, J. R. Del Castillo

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Resumen

This paper describes a rapid and sensitive method to determine inorganic phosphate, even in the presence of labile organic phosphate compounds and large quantities of proteins. The method eliminates the use of sodium arsenite, a highly toxic compound, substituting bismuth citrate for it to stabilize the phosphomolybdic acid complex formed during the interaction of inorganic phosphate and molybdate reduced by ascorbic acid. This method has also been adapted to microplates and has been used to determine the activities of Na/K ATPase and alkaline phosphatase of intestinal basolateral and luminal plasma membranes.

Idioma originalInglés
Páginas (desde-hasta)79-83
Número de páginas5
PublicaciónAnalytical Biochemistry
Volumen324
N.º1
DOI
EstadoPublicada - 1 ene. 2004
Publicado de forma externa

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