M. Tazul Islam and M. Jamaluddin Ahmedtrans. 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 (Jun. 2013), 01–15. DOI:https://doi.org/10.21743/.