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dc.contributor.authorTaher, Mohammad Ali-
dc.contributor.authorDehzoei, Ali Mostafavi-
dc.contributor.authorPuri, Bal Krishan-
dc.contributor.authorPuri, Swati-
dc.identifier.citationAnalytica Chimica Acta, 367(1-3), 55-61en
dc.description.abstractNickel 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.en
dc.format.extent228720 bytes-
dc.subjectNickel determinationen
dc.subjectDerivative spectrophotometryen
dc.subject2-Nitroso-1-naphthol-4-sulfonic aciden
dc.subjectTetradecyldimethylbenzylammonium chlorideen
dc.subjectMicrocrystalline naphthaleneen
dc.subjectStandard alloys and biological samplesen
dc.titleDerivative 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 methoden
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