Open Access Research Paper Views (863) Indirect speciation of Cr (VI) and Cr (III) in water and food samples using newly synthesized amberlite XAD-7 functionalized resin Maria Sadia J. Biodiv. & Environ. Sci. 10(1), 36-48, January 2017. Keywords: Amberlite XAD-7, Chromium species, Diphenylcarbazide, Preconcentration, Speciation Details