• R C Hussain

      Articles written in Journal of Chemical Sciences

    • 2-Hydroxy-1-acetonaphthoneoxime as analytical reagent: Gravimetric determination of nickel and palladium

      V V Balakrishna R C Hussain N Appala Raju

      More Details Abstract Fulltext PDF

      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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