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The adsorption of orthophosphate onto casein-iron precipitates
- Mittal, Vikas A., Ellis, Ashling, Ye, Aiqian, Edwards, Patrick J.B., Singh, Harjinder
- Food chemistry 2018 v.239 pp. 17-22
- adsorption, casein, ferric chloride, iron, orthophosphates, sodium caseinate
- This study explored the interactions of orthophosphate with casein-iron precipitates. Casein-iron precipitates were formed by adding ferric chloride at ≥10mM to sodium caseinate solutions ranging in concentration from 1 to 3%(w/v). The addition of different concentrations of orthophosphate solution to the casein-iron precipitates resulted in gradual adsorption of the orthophosphate, causing re-dispersion of the casein-iron complexes. The interactions of added orthophosphate with iron in the presence and absence of caseins are postulated, and new mechanisms are proposed. The re-dispersed soluble complexes of casein-iron-orthophosphate generated using this process could be used as novel iron fortificants.