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ANSTO Publications Online >
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Please use this identifier to cite or link to this item:
http://apo.ansto.gov.au/dspace/handle/10238/1762
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| Title: | Hydrolysis and dpeciation of Al bound to pectin and plant cell wall material and its reaction with the dye chrome Azurol S. |
| Authors: | Wehr, JB Blamey, FPC Hanna, JV Kopittke, PM Kerven, GL Menzies, NW |
| Keywords: | Pectins Cell Wall Aluminium Adsorption Hydrolysis Dyes |
| Issue Date: | 12-May-2010 |
| Publisher: | American Chemical Society |
| Citation: | Wehr, J. B., Blamey, F. P. C., Hanna, J. V., Kopittke, P. M., Kerven, G. L., & Menzies, N. W. (2010). Hydrolysis and dpeciation of Al bound to pectin and plant cell wall material and its reaction with the dye chrome Azurol S. Journal of Agricultural and Food Chemistry, 58(9), 5553-5560. |
| Abstract: | Hydrolysis of aluminum (Al) in solution increases at pH ≥ 4 and with an Al concentration. Pectin, an important anionic polysaccharide of plant cell walls, adsorbs Al, but this phenomenon is poorly understood. This study showed that Al3+ hydrolysis results in binding of Al to pectin in excess of the stoichiometric equivalent, leading to oversaturation of the pectin with Al. However, the degree of pectin methyl-esterification did not affect the extent of Al hydrolysis. Binding of Al to purified cell wall material also resulted in Al hydrolysis in a pH- and soluble Al concentration-dependent manner, but the source of cell wall material had no effect at fixed pH. Staining of Al-treated pectin and cell wall material from wheat (Triticum aestivum L.) and sunflower (Helianthus annuus L.) with the Al-specific dye, chrome azurol S (CAS), resulted in the formation of a purple color, with the intensity related to the extent of Al hydrolysis. © 2010, American Chemical Society |
| URI: | http://dx.doi.org/10.1021/jf100201x http://apo.ansto.gov.au/dspace/handle/10238/1762 |
| ISSN: | 0021-8561 |
| Appears in Collections: | Journal Articles |
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