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| 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 eff... |
| URI: | http://eprint.iitd.ac.in/dspace/handle/2074/586 |
| Appears in Collections: | Chemistry
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