Extraction in the Ni(II) - Organic ligand - Polymethine dye - Organic solvent system and its application for the spectrophotometric determination of nickel

I. S. Balogh, J. Molnár, V. Andruch

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Complex formation and extraction of Ni(II) with 1,3,3-trimethyl-2-[7-(1,3, 3-trimethyl-1,3-dihydroindol-2-ylidene)-hepta-1,3,5-trienyl]-3H-indolium chloride polymethine dye reagent and 1-nitroso-2-naphthol as organic ligand have been studied. The optimum conditions have been found: pH 7.2-9.5, c(dye reagent) = 1.25 × 10 -4 mol dm -3, c(1-nitroso-2-naphthol in toluene) = 1.25 × 10 -3 mol dm -3. The Beer's law is obeyed for nickel(II) concentration up to 5.0 mg dm -3. The effect of various foreign ions was examined. The new, simple, rapid, and sensitive (the molar absorptivity is 6.3 × 10 4 dm 3 mol -1 cm -1) procedure of Ni(II) determination has been suggested.

Original languageEnglish
Pages (from-to)343-346
Number of pages4
JournalChemical Papers
Issue number5
Publication statusPublished - Dec 1 2005


ASJC Scopus subject areas

  • Biochemistry
  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering
  • Materials Chemistry

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