- 作者: Sharad N. Duche and Purushottam M. Dhadke
- 中文摘要: The distribution equilibria of Pd(II) between aqueous bromide media and Cyanex-923 as well as Cyanex-471X in toluene was studied as a function of the concentration of extractants and the acid concentration. The extraction behaviour of Cyanex-471X is compared with Cyanex-923 as they contain different donor atoms. The quantitative extraction of Pd(II) was observed with Cyanex-923 in toluene from 4.0-8.0 mol l-l HBr media and was stripped out with 2.0 mol l-l hydrochloric acid. Similarly Pd(II) was quantitatively extracted with Cyanex-471X in toluene from 6.0-8.0 mol l-l HBr media and was stripped out with 7.0 mol l-l NH3 solution as well as 1.0 mol l-l of stabilized sodium thiosulfate solution at pH 4.4. The stoichiometry of the Cyanex-923 and Cyanex-471X extracted species determined from slope analysis was 1:2 and 1:1, respectively. Palladium(II) was extracted and separated from its binary and ternary mixture. These methods were successfully employed for analysis of palladium in real samples.
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