Graphene oxide/NiO nanocomposite-modified carbon paste electrode for the simultaneous detection of carmoisine and tartrazine as two azo dyes in food samples: Original scientific paper. J. Electrochem. Sci. Eng. [Internet]. 2026 Apr. 29 [cited 2026 May 22];16. Available from: https://pub.iapchem.org/ojs/index.php/JESE/article/view/3341