Rasha Saad Saber Al Tikrity, & Asmaa Ahmed Mohammed Al Rashidy. (2023). Spectrophotometric determination of Folic acid (B9) by oxidative Coupling Reaction with 4-nitro-aniline. Tikrit Journal of Pure Science, 27(6), 28–32. https://doi.org/10.25130/tjps.v27i6.755