Determination of nickel by potentiometric titration
AB-014
pt_BR
<p>A potentiometric method for the determination of nickel in gold and silver electroplating baths is described. The titration is carried out with KCN. Gold and silver are removed before titration by a reduction process. It is also possible to determine nickel in steel alloys, etc. (see the literature reference).</p><p>Ni<sup>2+</sup> + 4 KCN + 2NH<sub>4</sub><sup>+</sup> → (NH<sub>4</sub>)<sub>2</sub>[Ni(CN)<sub>4</sub>] + 4 K<sup>+</sup></p>
A potentiometric method for the determination of nickel in gold and silver electroplating baths is described. The titration is carried out with KCN. Gold and silver are removed before titration by a reduction process. It is also possible to determine nickel in steel alloys, etc. (see the literature reference).
Ni2+ + 4 KCN + 2NH4+ → (NH4)2[Ni(CN)4] + 4 K+