M. Tazul Islam, and M. Jamaluddin Ahmed , trans. 2013. “A Simple Spectrophotometric Method for the Trace Determination of Zinc in Some Real, Environmental, Biological, Pharmaceutical, Milk and Soil Samples Using5,7- Dibromo-8-Hydroxyquinoline”. Pakistan Journal of Analytical & Environmental Chemistry 14 (1): 01-15. https://doi.org/10.21743/.