Electrochemical Determination of Tartrazine in Foods by Voltammetry with a Screen-printed Carbon/Chitosan-MnO2 Microcomposite Electrode |
| |
| Authors: | Edgar Nagles John J Hurtado |
| |
| Institution: | 1. Facultad de Química e Ingeniería Química, Universidad Nacional Mayor de San Marcos, 15001 Lima, Perú;2. Departament of Chemistry, Universidad de los Andes, Carrera 1 No. 18A-12, 111711 Bogotá, Colombia |
| |
| Abstract: | This paper presents a new application for a screen-printed carbon electrode (SPCE) modified with chitosan (Cs) and manganese oxide (II). This new electrode (Cs-MnOX/SPCE) was applied in the detection of tartrazine (TZ) by linear scan voltammetry (LSV). The anodic peak current for TZ increased by nearly 500 % compared with Cs/SPCE and unmodified SPCE. The surface of the electrode was characterized by cyclic voltammetry. The detection limit was 0.06 μmol/L. The relative standard deviations (RSDs) were between 1.0 and 6.0 % (n=15). The accuracy of the new method was evaluated with real samples spiked with known quantities of TZ. |
| |
| Keywords: | carbon paste chitosan manganese oxide (II) tartrazine Lineal scan voltammetry |
|
