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REDUCTION OF POTASSIUM CHROMATE BY D-FRUCTOSE, D-GALACTOSE, D-MANNOSE, D-GLUCOSE, AND L-SORBOSE

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Title REDUCTION OF POTASSIUM CHROMATE BY D-FRUCTOSE, D-GALACTOSE, D-MANNOSE, D-GLUCOSE, AND L-SORBOSE
 
Creator RAO, CP
KAIWAR, SP
 
Subject electron-paramagnetic-res
chromium(vi)
glutathione
equilibria
oxidation
cr(vi)
acid
 
Description Chromate is readily reduced by various saccharides under different experimental conditions, and its reduction has been followed using absorption and EPR spectroscopies and electrochemistry. The reduction of Cr(VI) was found to be characteristic of the saccharide used and the reductive capabilities follow a trend, D-fructose > L-sorbose > D-galactose > D-mannose > D-glucose at pH 1.65 and D-fructose > D-galactose > D-mannose > L-sorbose > D-glucose at pH 0.35. Similar trends were noticed from EPR and electrochemistry studies. As the reduction of chromate was found to go via soluble, reactive, and relatively long-lived Cr(V) intermediates having different life times, the biological toxicity and ecological hazard created in the presence of Cr(VI) salts by various molecules containing such saccharide moieties is expected to follow a reverse trend.
 
Publisher ELSEVIER SCI LTD
 
Date 2011-07-22T11:49:55Z
2011-12-26T12:52:24Z
2011-12-27T05:37:12Z
2011-07-22T11:49:55Z
2011-12-26T12:52:24Z
2011-12-27T05:37:12Z
1993
 
Type Article
 
Identifier CARBOHYDRATE RESEARCH, 244(1), 15-25
0008-6215
http://dx.doi.org/10.1016/0008-6215(93)80002-V
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6215
http://hdl.handle.net/10054/6215
 
Language en