CFIA-Turbidimetric and Photometric Determination of Vitamin B9 (Folic acid) Using LEDs as a Source of Irradiation and Two Solar Cells as an Energy Transducer. Baghdad Sci.J [Internet]. 2017 Dec. 3 [cited 2024 Nov. 26];14(4):0773. Available from: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/2421