Mineral Partitioning in Milk and Milk Permeates at High Temperature

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dc.contributor.authorKaombe, Divina D.
dc.contributor.authorDu, Yanhong
dc.contributor.authorLewis, Michael J.
dc.date.accessioned2016-07-18T10:02:20Z
dc.date.available2016-07-18T10:02:20Z
dc.date.issued2012
dc.descriptionFull text can be accessed at http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8476328&fileId=S0022029911000616en_US
dc.description.abstractThe soluble phase of milk was separated at 20 and 80°C using ultrafiltration. The resulting permeates were then subjected to further ultrafiltration and dialysis at close to these two temperatures. It was found that pH, Ca2+ and soluble Ca decreased as the separation temperature increased both in original UF permeates and in dialysates obtained from these permeates, but P decreased only slightly. The major reason for these changes was due to the precipitation of calcium phosphate/citrate complexes onto the casein micelle with concomitant release of H+. The pH of both permeates and dialysates from milk at 20°C were slightly higher than for milk. When UF permeates collected at 20 and 80°C, were each dialysed at both these temperatures, the dialysate collected at 80°C showed much less temperature dependence for pH and ionic calcium compared with that collected at 20°C. This is in contrast to milk, which shows considerable temperature dependence for pH and ionic calcium. Further experiments revealed that the pH and Ca2+ concentration of permeates showed high temperature dependence above the temperature at which they were separated, but a much lower temperature dependence below that temperature. These findings suggest that dialysis and UF of milk at high temperature provide the best means yet for estimating the pH and ionic calcium of milk at that temperature.en_US
dc.identifier.citationKaombe, D.D., Du, Y. and Lewis, M.J., 2012. Mineral partitioning in milk and milk permeates at high temperature. Journal of Dairy Research, 79(01), pp.1-6.en_US
dc.identifier.doi10.1017/S0022029911000616
dc.identifier.urihttp://hdl.handle.net/20.500.11810/3248
dc.language.isoenen_US
dc.publisherCambridge University Pressen_US
dc.subjectUltrafiltrationen_US
dc.subjectDialysisen_US
dc.subjectpH ionic calciumen_US
dc.subjectSoluble mineralsen_US
dc.titleMineral Partitioning in Milk and Milk Permeates at High Temperatureen_US
dc.typeJournal Articleen_US
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