ADSORPTION OF A COPPER (II) COMPLEX ON CALCIUM PHOSPHATE INTERCALATED WITH 4-AMINOBENZOIC ACID - SYNTHESIS AND ELECTROCHEMICAL INVESTIGATION

作者：Silva Camila F N^*; de Souza Fernando M; Santos Jessica P; Dias Ana Paula B; Santana Ana Paula R; Lazarin Angelica M; Sernaglia Rosana L; Andreotti Elza I S; Airoldi Claudio

来源：Quimica Nova, 2013, 36(8): 1170-1175.

DOI：10.1590/s0100-40422013000800016

• calcium phosphate
• intercalation
• carbon-paste electrode

In this study, the adsorption isotherm of copper (II) on a calcium phosphate host intercalated with 4-aminobenzoic acid in an ethanol solution was investigated. This gave a maximum adsorption capacity of 1.74 mmol g(-1). The material was incorporated into a carbon-paste electrode, and its electrochemical properties were investigated. However, for a dopamine solution, the anodic peak current increased owing to the electrocatalytic oxidation. The electrode presented the same response for at least 150 successive measurements, showing good repeatability. The modified electrode is very stable and reproducible. The electrode sensor was successfully applied for dopamine determination in pharmaceutical preparations.

• 出版日期2013