A thermometric titration study of the interaction of Al3+, Co2+, Ni2+ and Zr4+ with xylenol orange

Mohamed Rozali Othman, John O. Hill, Robert J. Magee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A thermometric titrimetry study of the interaction in aqueous solution of A13+, Co2+, Ni2+ and Zr4+ with xylenol orange has revealed in each case a linear reaction heat/[Mn+] relationship at a specified pH, thereby suggesting the potential of metallochromic indicators for the analytical determination of these metals in water. The effect of pH on the reaction heat is investigated and is interpreted in terms of the ability of these metal cations to complex with the known xylenol orange species existing at the various pH studied. An interference study, involving transition and non-transition metal ions, is also reported and the interference effect, as measured by the deviation of Q′/Q from unity (Q′ and Q are the relevant reaction heats in the presence and absence of interfering ion), is partially explained in terms of the coordination numbers, relative sizes and crystal field stabilization energies of the cations studied and the known behaviour of xylenol orange in aqueous solution.

Original languageEnglish
Pages (from-to)337-350
Number of pages14
JournalMikrochimica Acta
Volume90
Issue number5-6
DOIs
Publication statusPublished - Sep 1986
Externally publishedYes

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Titration
Cations
Metals
Metal ions
Stabilization
Ions
Crystals
Water
xylenol orange
Hot Temperature

Keywords

  • metals
  • thermometric titration
  • xylenol orange

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

A thermometric titration study of the interaction of Al3+, Co2+, Ni2+ and Zr4+ with xylenol orange. / Othman, Mohamed Rozali; Hill, John O.; Magee, Robert J.

In: Mikrochimica Acta, Vol. 90, No. 5-6, 09.1986, p. 337-350.

Research output: Contribution to journalArticle

Othman, Mohamed Rozali ; Hill, John O. ; Magee, Robert J. / A thermometric titration study of the interaction of Al3+, Co2+, Ni2+ and Zr4+ with xylenol orange. In: Mikrochimica Acta. 1986 ; Vol. 90, No. 5-6. pp. 337-350.
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