Zannat, Tasnima, and Mohammed Jamaluddin Ahmed. 2014. “A Simple and Rapid Spectrophotometric Method for the Determination of Iron in Environmental, Biological, Pharmaceutical, Food and Soil Samples Using 1,2-Dihydroxybenzene-3,5-Disulfonic Acid”. European Journal of Chemistry 5 (1):101-10. https://doi.org/10.5155/eurjchem.5.1.101-110.882.