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Título : Interaction between the low molecularmass components of blood serum and the vanadium(III)–6-methylpicolinic acid system
Autor : Machado, Joseph
Martínez, José Daniel
Araujo, Mary Lorena
Brito, Felipe
Del Carpio, Edgar
Hernández, Lino
Lubes, Vito
Palabras clave : Vanadium(III) complexes 6-Methylpicolinic acid Potentiometric studies Speciation Ternary complexes
Fecha de publicación : 23-Jun-2015
Resumen : The complexes formed between vanadium(III) and 6-methylpicolinic acid (H6Mepic) with small blood serum bioligands: lactic, oxalic, citric and phosphoric acids (HLac), (H2Ox), (H3Cit) and (H3PO4) were studied in aqueous solution by means of electromotive forcesmeasurements emf(H) at 25°C and 3.0mol dm−3 KCl as ionicmedium. The potentiometric data were analysed using the least-squares computational program LETAGROP, obtaining the complexes [V(6Mepic)(Lac)]+, V(OH)(6Mepic)(Lac), [V(OH)2(6Mepic)(Lac)]−, [V(OH)3(6Mepic)(Lac)]2− in the vanadium(III)–6Mepic-Lac system. In the case of the vanadium(III)–6Mepic-Ox system the complexes V(6Mepic)(Ox) and [V(6Mepic)2(Ox)]− were observed , in the vanadium(III)–6Mepic–H3PO4 system the complexes [V(6Mepic)(H2PO4)]+ and V(6Mepic)(HPO4) were detected, and finally in the vanadium(III)–6Mepic-Cit system the complexes V(6Mepic)(HCit), [V(6Mepic)(Cit)]− and [V(OH)(6Mepic)(Cit)]2− were observed . The respective stability constants of the complexes formed in aqueous solution were determined.
URI : http://saber.ucv.ve/jspui/handle/123456789/10388
ISSN : 0167-7322
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