N Appala Raju
Articles written in Journal of Chemical Sciences
Volume 87 Issue 8 August 1978 pp 291-294 Inorganic and Analytical
2-Hydroxy-1-acetonaphthoneoxime is proposed as a reagent for the gravimetric determination of nickel and palladium. Nickel (10·0–40·0 mg) is quantitatively precipitated in the pH range 8·0–10·0 using a 1% (w/v) reagent solution in presence of ammonium chloride—ammonium hydroxide buffer. The greenish yellow precipitate is digested for 30 min and dried at 110–120°C to constant weight, and weighed as Ni(C12H10O2N)2, the gravimetric factor being 0·1278. Separation and determination of copper and nickel from the same portion of the solution is described. This procedure is applied in the analysis of constantan. Palladium (5·0–35·0 mg) is quantitatively precipitated using a 0·5% (w/v) reagent solution in presence of 0·05–0·1 N HCl. The yellow precipitate is weighed as Pd(C12H10O2N).H2O, the gravimetric factor being 0·2028.
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