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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, and V. Andruch

Department of Chemistry, College of Nyíregyháza, HU-4400 Nyíregyháza, Hungary

 

E-mail: baloghj@zeus.nyf.hu

Received: 23 August 2004

Abstract: 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 × 10−3mol 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 × 104dm3mol−1cm−1) procedure of Ni(II) determination has been suggested.

Full paper in Portable Document Format: 595a343.pdf

 

Chemical Papers 59 (5) 343–346 (2005)

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