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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/586

Title: Derivative UV-visible spectrophotometric determination of nickel in alloys and biological samples after preconcentration with the ion pair of 2-nitroso-1-naphthol-4-sulfonic acid and tetradecyldimethylbenzylammonium chloride onto microcrystalline naphthalene or by a column method
Authors: Taher, Mohammad Ali
Dehzoei, Ali Mostafavi
Puri, Bal Krishan
Puri, Swati
Keywords: Nickel determination
Derivative spectrophotometry
2-Nitroso-1-naphthol-4-sulfonic acid
Tetradecyldimethylbenzylammonium chloride
Microcrystalline naphthalene
Standard alloys and biological samples
Issue Date: 1998
Citation: Analytica Chimica Acta, 367(1-3), 55-61
Abstract: Nickel is quantitatively retained by tetradecyldimethylbenzylammonium 2-nitroso-1-naphthol-4-sulfonate in microcrystalline naphthalene in the pH range 7.2-11.8 from a large volume of aqueous solutions of various alloys and biological samples. After Æltration, the solid mass consisting of the nickel complex of 2-nitroso-1-naphthol-4-sulfonate and naphthalene was dissolved in 5 ml of dimethylformamide and the nickel as determined by first derivative UV-visible spectrophotometry. Nickel can alternatively be quantitatively adsorbed on a 2-nitroso-1-naphthol-4-sulfonic acid- tradecyldimethylbenzylammoniumnaphthalene adsorbent packed in a column and determined similarly. The detection limit is 0.3 mg mlˇ1 (signal to noise ratioà2) and the calibration graph is linear over the concentration range 0.9-120 mg mlˇ1 in dimethylformamide solution with a correlation coeffcient of 0.9995 (nà6) and relative standard deviation for 8 mg mlˇ1 nickel of 1.4% (nà6). Various parameters such as the effect of pH, volume of aqueous phase and interference of a number of metal ions on the determination of nickel have been studied in detail to optimize the conditions for determination in standard alloys and biological samples.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/586
Appears in Collections:Chemistry

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