Electrophoretic studies of biologically important mixed metal - Ascorbic acid -Nitrilotriacetate complexes

Sarika Sachan, Praveen P. Singh, Pramod Kumar, V. K. Nigam, R. K.P. Singh

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


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 10 3.77, 10 2.47,10 2.27 and that of metal-ascorbic acid-NTA mixed complexes have been found to be 10 6.05, 10 5.93, 10 5.75, for Fe(III), Cu(II) and Co(II) complexes, respectively at 25 °C and ionic strength I c = 0.1 mol dm -3 (HClO 4).

Original languageEnglish
Pages (from-to)461-464
Number of pages4
JournalCroatica Chemica Acta
Issue number4
StatePublished - Dec 2011
Externally publishedYes


  • Binary complex
  • Ionophoretic technique
  • Mixed complex
  • Overall mobility
  • Stability constants


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