Preparation and Characterization of 1,2,3,4- Butane four Carboxylate Transition Metal Complexes

1,2,3,4- butane four carboxylic acidis (Na4C8H6O8) is mainly used to prepare photosensitive materials, medical polymer materials and functional polymer membrane materials.As a permanent finishing agent, 1,2,3,4- butane four carboxylic acid plays an irreplaceable role.In this paper, the preparation of metal complexes by the reaction of 1,2,3,4-butane tetracarboxylic acid tetrasodium salt (Na4C8H6O8) with transition metals is described. The composition and structure of the prepared metal complexes were characterized by infrared spectroscopy, thermogravimetric analysis and elemental analysis. At the same time, through the analysis of thermogravimetric curves, the order of thermal stability of metal complexes is (from large to small): Co2C8H6O8·2H2O > Cd2C8H6O8 ·2H2O > Mn2C8H6O8·2H2O > Ni2C8H6O8·2H2O > Zn2C8H6O8·2H2O > Zn2C8H6O8·2H2O > Cu2C8H6O8 ·2H2O.

Development of Magnetic-Resonance Contrast Composition Based on Disodium Salt of Gd-DTPA

In this research we have studied contrast composition in the form of an aqueous solution containing gadolinium oxide (Gd2O3), diethylenetriaminepentaacetic acid (DTPA), medical polymer - polyvinylpyrrolidone mol. sq. (12000 ± 5000) daltons in an amount of 0.5-5 wt. %. To reduce the content of free gadolinium in the composition it has been suggested to change the stoichiometric ratio of the concentrations of DTPA/Gd2O3in the mixture. The studies have shown that at a concentration ratio of DTPA/Gd2O3, 2.07 - 2.10 the impurity content of free gadolinium is at least 0.25%, which is significantly below the regulated value - 0.5%. The conducted biomedical tests have confirmed the functionality of the resulting contrast composition.