New Approach for the On-Line Spectrophotometric Determination of Folic Acid in Pure and Pharmaceutical Preparation via Oxidation by Cerium(IV) Sulphate Using Ayah 3Sx3-3D-Solar Cell CFI Spectrophotometer Analyzer. Iraqi Journal of Science [Internet]. 2023 Nov. 24 [cited 2024 May 20];55(3B):1153-6. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/11541