Complexation mechanism of dextrin with metal hydroxides

Bhaskar Raju, G and Forsling, Willis and Holmgren, Allan (1998) Complexation mechanism of dextrin with metal hydroxides. Journal of Colloid and Interface Science, 200 . pp. 1-6.



The complexation of dextrin with metal hydroxides was studied quantitatively by FT-IR and UV–visible reflectance techniques. Though three hydroxyl groups are present in dextrin molecule, complexation involving only two hydroxyl groups situated at the C-2 and C-3 positions has been studied by many investigators. Involvement of a third hydroxyl group at the C-6 position was examined in the present study. Since metal hydroxy sites were found to play a key role in the complexation precipitates of Ca(OH)2 and Pb(OH)2 were separately mixed with dextrin solutions at different ratios. Complexes with a stoichiometry of 2:3 (dextrin:metal ion) were identified, indicating the involvement of a third hydroxyl group. However, the ratio of metal ions to hydroxyl groups of dextrin remained as 1:2. Complexation between dextrin and metal hydroxide via complexation mechanism is proposed.

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:dextrin; metal hydroxide; complexation; condensation mechanism
Divisions:NML Chennai > Mineral Processing
ID Code:4010
Deposited By:Dr. G Bhaskar Raju
Deposited On:25 Sep 2011 16:39
Last Modified:13 Dec 2011 16:58
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