Spectrophotometric Determination of Catecholamine Containing Drugs Using Calcon Dye. Pakistan Journal of Analytical & Environmental Chemistry, Pakistan, v. 23, n. 2, p. 247–258, 2024. DOI: 10.21743/pjaec/2022.12.07. Disponível em: http://pjaec.pk/index.php/pjaec/article/view/36. Acesso em: 7 jul. 2025.