Taher, M. W., Guzar, S. H. ., & Hanoon, H. D. (2022). Spectrophotometric determination of Co (II) in analytical sample using anew chromogenic reagent (PTMH). International Journal of Health Sciences, 6(S8), 1082–1095. https://doi.org/10.53730/ijhs.v6nS8.9788