Implication of metal complexes in biology and medicine, the system cadmium (II)/iron (II)/zinc (II) - sarcosine
Abstract
Implicación de los complejos metálicos en biología y medicina, el sistema cadmio (II)/hierro (II) / zinc (II) - sarcosina. Se describe una técnica que implica el uso de la técnica electroforética en papel para el estudio de los equilibrios en un sistema complejo binario en solución. Este método se basa en la migración de una mancha de ion metálico en una tira de papel a diferentes valores de pH de un electrolito de fondo que contiene 0,1 mol L-1 de ácido perclórico y 0,01 mol L-1 de sarcosina. Un gráfico de pH frente a movilidad proporciona información sobre los complejos binarios y permite calcular sus constantes de estabilidad. Se encontró que la primera y segunda constantes de estabilidad de los complejos [Cd (II) - sarcosina], [Fe (II) - sarcosina] y [Zn (II) - sarcosina] eran (3,94 ± 0,03; 2,66 ± 0,07), (3,70 ± 0,01; 2,54 ± 0,03) y (4,39 ± 0,01; 2,74 ± 0,07) valores de constantes de estabilidad logarítmica para complejos de Cd (II), Fe (II) y Zn (II), respectivamente, a fuerza iónica de 0,1 Mol L-1 y temperatura de 35° C. Las constantes de estabilidad siguen el orden: Cd (II) > Fe (II) > Zn (II).
Implication of metal complexes in biology and medicin, the system cadmium (II)/iron (II) / zinc (II) - sarcosine. A technique involving the use of paper Electrophoretic Technique is described for the study of equilibria in binary complex system in solution. This methodis based upon the migration of a spot of metal ion on a paper strip at different pH values of background electrolyte containing 0.1 mol L-1 perchloric acid and 0.01 mol L-1 sarcosine. A graph of pH against mobility gives information about the binary complexes and permit to calculate their stability constants. The first and second stability constants of [Cd (II) - sarcosine], [Fe (II) - sarcosine] and [Zn (II) - sarcosine] complexes were found to be (3.94 ± 0.03; 2.66 ± 0.07), (3.70 ± 0.01; 2.54 ± 0.03) and (4.39 ± 0.01; 2.74 ± 0.07) logarithm stability constant values for Cd (II), Fe (II) and Zn (II) complexes, respectively at ionic strength 0.1 Mol L-1 and temperature of 350 C. The stability constants follow the order: Cd (II) > Fe (II) > Zn (II).
Implication of metal complexes in biology and medicin, the system cadmium (II)/iron (II) / zinc (II) - sarcosine. A technique involving the use of paper Electrophoretic Technique is described for the study of equilibria in binary complex system in solution. This methodis based upon the migration of a spot of metal ion on a paper strip at different pH values of background electrolyte containing 0.1 mol L-1 perchloric acid and 0.01 mol L-1 sarcosine. A graph of pH against mobility gives information about the binary complexes and permit to calculate their stability constants. The first and second stability constants of [Cd (II) - sarcosine], [Fe (II) - sarcosine] and [Zn (II) - sarcosine] complexes were found to be (3.94 ± 0.03; 2.66 ± 0.07), (3.70 ± 0.01; 2.54 ± 0.03) and (4.39 ± 0.01; 2.74 ± 0.07) logarithm stability constant values for Cd (II), Fe (II) and Zn (II) complexes, respectively at ionic strength 0.1 Mol L-1 and temperature of 350 C. The stability constants follow the order: Cd (II) > Fe (II) > Zn (II).
Description
Vol. 41, No. 1