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Shyla, B. and Vijaya Bhaskar, C. and Nagendrappa, G. (2012) Iron(III) oxidized nucleophilic coupling of catechol with o-tolidine/p-toluidine followed by 1,10-phenanthroline as new and sensitivity improved spectrophotometric methods for iron present in chemicals, pharmaceutical, edible green leaves, nuts and lake water samples. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 86. 152 - 158. ISSN 1873-3557