Zainab H. Khudhair. (2022). Spectrophotometric determination of vanadium (V) using an organic reagent [4-(6- nitro -2-benzothiazolylazo)pyrogallol]. Mesopotamia Environmental Journal (mesop. Environ. J) ISSN: 2410-2598, 4(1), 42–51. Retrieved from https://mej.uobabylon.edu.iq/index.php/mej/article/view/66