Complexation and Spectrophotometric Determination of Cobalt(II) Ion with 3-(2′-thiazolylazo)-2,6-diaminopyridine

Authors

  • Natthapon Veerachalee Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.
  • Pongpol Taweema Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.
  • Apisit Songsasen Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.

Keywords:

cobalt, thiazolylazo dye, spectrophotometry

Abstract

The complexation of 3-(2′-thiazolylazo)-2,6-diaminopyridine (TADAP) with cobalt(II) has been studied spectrophotometrically. The stability constant of TADAP ligand with cobalt(II) ion has been determined at a constant temperature, where the molar ratio of this complex is 1:2 (metal:ligand). TADAP has been prepared and characterized on the basis of FT-IR spectral data. A procedure for the spectrophotometric determination of this complex is proposed where it is rapid, sensitive and highly specific. Beer’s law was obeyed in the range 2.0 × 10-6-1.2 × 10-5 M at pH 10 to form a green complex.
The limit of detection is 5.26 × 10-7 M (ε = 1.52 × 104 l-1mol-1cm-1 at λmax = 598 nm).

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Published

2007-12-30

How to Cite

Natthapon Veerachalee, Pongpol Taweema, and Apisit Songsasen. 2007. “Complexation and Spectrophotometric Determination of Cobalt(II) Ion With 3-(2′-Thiazolylazo)-2,6-Diaminopyridine”. Agriculture and Natural Resources 41 (4). Bangkok, Thailand:675-80. https://li01.tci-thaijo.org/index.php/anres/article/view/244308.

Issue

Vol. 41 No. 4 (2007): October-December

Section

Research Article

License

online 2452-316X print 2468-1458/Copyright © 2022. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/),
production and hosting by Kasetsart University of Research and Development Institute on behalf of Kasetsart University.