Ashour S. A novel sensitive colorimetric determination of catecholamine drug in dosage form via oxidative coupling reaction with MBTH and potassium ferricyanide. Drug Anal. Res. [Internet]. 2026 Mar. 19 [cited 2026 Aug. 3];5(1):51-8. Available from: https://seer.ufrgs.br/index.php/dar/article/view/113058