Indirect voltammetric determination of potassium and caesium and direct amperometric determination of potassium with tetraphenylborate using silicone rubber based graphite electrodes

• DOI: 10.1007/bf00424176
• Publication Date: 2004-11-10T08:32:06Z
• Authors: E. Siska; E. Pungor
• Keywords: Sodium tetraphenylborate; Tetraphenylborate; Amperometry; Silicone rubber; Caesium

The electrochemical oxidation of tetraphenylborate ions was investigated by using silicone rubber based graphite electrode. An indirect voltammetric method was elaborated for the determination of potassium and caesium. A method is also given for the determination of potassium with sodium tetraphenylborate by using amperometric end-point indication. The latter method is more accurate. The relative standard deviation is ± 0.85%.