Spectrophotometric Determination of Thymol in Pharmaceutical Preparations Via Oxidative Coupling Reaction with 2,4- dinitrophenylhydrazine in the Presence of Potassium Periodate. Iraqi Journal of Science. 2023;55(1):27-34. Accessed March 31, 2025. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/11921