The reaction of chromate with diphenylcarbazide. I
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Cited by (36)
Sulfate radical formation by Cr(III) activation of peroxydisulfate – Diphenylcarbazide spectrophotometric determination of sulfate radical and its scavenging activity
2021, Spectrochimica Acta - Part A: Molecular and Biomolecular SpectroscopyCitation Excerpt :Here, Cr(VI) ions were determined spectrophotometrically by means of a well-known method depending on the chromogenic reaction between Cr(VI) and diphenylcarbazide [22]. According to this method, the reaction between dichromate and diphenylcarbazide involves preliminary oxidation of the precursor ligand to diphenylcarbazone, with subsequent red-violet complex formation [23] having maximal absorbance at 540 nm in acidic medium [24,25]. Actually, there are very few studies in the literature for spectrophotometric determination of sulfate radicals.
1,5 diphenyl carbazide immobilized cross-linked chitosan films: An integrated approach towards enhanced removal of Cr(VI)
2017, Journal of Molecular LiquidsCitation Excerpt :Moreover, IR spectra of C + G + D film before and after adsorption of Cr(VI) exhibit (Supporting information Fig. S6) shift in the peak position at 1652 cm− 1 to lower wavenumber (1634 cm− 1) attributed to oxidation of 1,5-diphenyl carbazide to corresponding carbazone. It implies that Cr(VI) is reduced to Cr(III) with concomitant oxidation of D during adsorption process followed by co-ordination of Cr(III) to oxidized D [30]. The presence of chromium (Fig. 1d) on the surface can be seen in the C + G + D film where expanded globular morphology is observed after treatment with Cr(VI).