Development of a selective fluorimetric technique for rapid trace determination of zinc using 3-hydroxyflavone

Salma M.Z. AL-Kindy*, Khadija H. Al-Hinai, Fakhr Eldin O. Suliman, Haider J. Al-Lawati, Avin Pillay

*Corresponding author for this work

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16 Citations (Scopus)


A sensitive and a selective spectrofluorimetric method have been developed for the rapid determination of trace levels of zinc. The method is based on complex formation between zinc and 3-hydroxyflavone (3HF), which displays an intense emission signal around 478 nm. The analytical performance of the method was examined by considering the factors that affect the complex formation such as pH, mole ratio of the metal and solvent type. The optimum conditions for the complex formation were metal to ligand stoichiometric ratio of 1:1 at pH 7.5 with 0.1. M Tris buffer. Under these conditions the detection limit attained was 1.5. ppb. The method was appropriately validated and yielded relative standard deviations of less than 2% (n= 5), which was considered acceptable. It was successfully applied to the trace determination of zinc in drinking water, hair shampoo and pharmaceutical samples.

Original languageEnglish
Pages (from-to)147-152
Number of pages6
JournalArabian Journal of Chemistry
Issue number2
Publication statusPublished - Apr 2011


  • Hydroxyflavone
  • Spectrofluorimetry
  • Trace levels
  • Zinc

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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