Simultaneous Voltammetric Determination of Paracetamol, Codeine and Caffeine on Diamond‐like Carbon Porous Electrodes

摘要: A porous electrode material combining the features of vertically aligned multi-walled carbon nanotubes (VAMWCNT) and diamond-like films (DLC) have been developed for a highly sensitive electrochemical sensor. For working preparation, DLC has grown onto VAMWCNT, forming porous, conductive stable composite. The performance this DLC:VAMWCNT investigated toward detection analysis three well-known molecules, namely paracetamol, codeine caffeine. ternary mixture these analytes was simultaneously determined under optimum experimental conditions using square-wave voltammetry. Wide linear concentration ranges limits 3.34×10−7 mol L−1, 1.57×10−7 mol L−1 3.67×10−7 mol L−1 were obtained caffeine, respectively. We conclude that proposed voltammetric method comprise reliable methodology simultaneous determination caffeine in biological matrix samples.