Development of Colorimetric Method for the Quantitative Analysis of Amlodipine Besylate in Dosage Form Using 4-Dimethyleaminobenzaldehyde as Derivatizing Reagent. Pak. J. Anal. Environ. Chem. [Internet]. 2020 Jun. 28 [cited 2025 Jul. 6];21(1):27 – 33. Available from: https://pjaec.pk/index.php/pjaec/article/view/119