Original scientific paper

https://doi.org/10.5562/cca1778

Electrophoretic Studies of Biologically Important Mixed Metal – Ascorbic Acid –Nitrilotriacetate Complexes

Sarika Sachan ; Electrochemical Laboratory of Green Synthesis, Department of Chemistry, University of Allahabad, Allahabad – 211002 U.P. India
Praveen Pratap Singh ; Electrochemical Laboratory of Green Synthesis, Department of Chemistry, University of Allahabad, Allahabad – 211002 U.P. India
Pramod Kumar ; Electrochemical Laboratory of Green Synthesis, Department of Chemistry, University of Allahabad, Allahabad – 211002 U.P. India
Vaibhav Kumar Nigam ; Electrochemical Laboratory of Green Synthesis, Department of Chemistry, University of Allahabad, Allahabad – 211002 U.P. India
Rana Krishna Pal Singh ; Electrochemical Laboratory of Green Synthesis, Department of Chemistry, University of Allahabad, Allahabad – 211002 U.P. India

Abstract

Quantitative indication of a complex formation comes from the estimation of the stability or
formation constants characterizing the equilibria corresponding to the successive addition of ligands. The
binary equilibria of metal (II) / (III)–ascorbic acid and also mixed equilibria metal (II) / (III)–ascorbic
acid–NTA have been studied using ionophoretic technique. The stability constants of metal–ascorbic
acid binary complexes are found to be 103.77, 102.47,102.27 and that of metal–ascorbic acid–NTA mixed
complexes have been found to be 106.05, 105.93, 105.75, for Fe(III), Cu(II) and Co(II) complexes, respectively at
25 °C and ionic strength I_c = 0.1 mol dm–3 (HClO₄). (doi: 10.5562/cca1778)

Keywords

binary complex; mixed complex; overall mobility; stability constants; ionophoretic technique

Hrčak ID:

75050

URI

https://hrcak.srce.hr/75050

Publication date:

20.12.2011.

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