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Determination of Cu(III) in semiconductor ceramics using cationic violet reagent |
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| Authors: | Ioseph S Balogh Michael Ruschak Vasil Andruch Ferenc Billes |
| Institution: | 1. Department of Chemistry, College of Nyíregyháza, HU-4400, Nyíregyháza, Hungary 2. Department of Analytical Chemistry, U?horod National University, UA-88000, U?horod, Ukraine 3. Department of Analytical Chemistry, University of P.J. ?afárik, SK-04154, Ko?ice, Slovak Republic 4. Department of Physical Chemistry and Material Science, Budapest University of Technology and Economics, H-1521, Budapest, Hungary 5. Institute for Chemical Technologies and Analytics, Technical University of Vienna, A-1060, Vienna, Austria |
| Abstract: | A method is presented for the determination of Cu(III) ion in semiconductor ceramic materials. It is based on (a) the reaction of copper(III) with Fe(II) ions, (b) the quantitative formation of Fe(III) ions, (c) liquid-liquid extraction of Fe(III) in the form of an ion associate between the FeCl 4 - anion with a Cationic Violet dye, and (d) spectrophotometric quantitation of the ion associate. All processes are executed in a single sequence of steps. The absorbance of the colored extracts obeys Beer's law in the range from 0.16 to 1.92 mg L?1 of Cu(III). The molar absorptivities range from 38,000 to 82,000 L mol?1 cm?1 depending on the kind of extractant used. The effects of other ions on the recovery of Cu(III) were studied, and those that generally occur with copper in semiconductor samples do not interfere. |
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