This work presents a new application for MoO3 combined with carbon paste to prepare a microcomposite electrode (Mo(VI)Ox/CPE) for the simultaneous determination of paracetamol (PCM) and Allure Red (AR) by square-wave voltammetry (SWV). The anodic peak currents for PCM and AR were 70.0 and 80.0 % high compared with an unmodified carbon paste electrode. The surface areas of Mo(VI)Ox/CPE and CPE were evaluated by cyclic voltammetry. The detection limit were 0.14 and 0.38 μmol/L for PCM and AR respectively. The relative standard deviations (RSDs) were 2.0 % (n=7). Stability, shelf life and possible interferences were also evaluated with very acceptable results.
Bibliographical noteFunding Information:
E. N and C. M. thank the Universidad Nacional Mayor de San Marcos (project C20071301and C21070961) for financial support. Additionally, J.H. thanks the Research Fund of the Faculty of Sciences of the Universidad de los Andes and the Chemistry Department for providing funding (project no. INV‐2020‐105‐2038).
© 2021 Wiley-VCH GmbH
- allura red
- carbon paste
- molybdenum oxide
- square wave voltammetry