Open Access Research Paper Views (396) Download (112) Indirect speciation of Cr (VI) and Cr (III) in water and food samples using newly synthesized amberlite XAD-7 functionalized resin Maria Sadia J. Bio. Env. Sci.10( 1), 36-48, January 2017. Key: Amberlite XAD-7Chromium speciesDiphenylcarbazidePreconcentrationSpeciation Details