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Physico-chemical characterization of dairy calcium
phosphate industrial powders
Marion Bedas, Eric Beaucher, Anne-Cécile Santellani, Pierre Schuck, Gilles
Garric, Jean-Michel Bouler, Sophie Quillard, Paul Pilet, Frederic Gaucheron
To cite this version:
Marion Bedas, Eric Beaucher, Anne-Cécile Santellani, Pierre Schuck, Gilles Garric, et al.. Physico-chemical characterization of dairy calcium phosphate industrial powders. IDF Dairy Science & Tech-nology Symposia Concentration and Drying, Apr 2016, Dublin, Ireland. 2016. �hal-01303972�
IDF Dairy Science & Technology Symposia 2016, Dublin, 11-13th April - Concentration and Drying
Physico-chemical characterization of dairy calcium phosphate industrial powders
M. Bédas1,2, E. Beaucher1,2, AC. Santellani1,2, P. Schuck1,2, G. Garric1,2, JM. Bouler3, S. Quillard4, P. Pilet5,
F. Gaucheron1,2
1 INRA, UMR1253 Science and Technology of Milk and Egg, F-35000 Rennes, France 2 AGROCAMPUS OUEST, UMR1253, F-35000 Rennes, France
3 CNRS UMR6230, Interdisciplinary Chemistry: Synthesis, Analysis, Modelling, F-44322 Nantes, France 4 CNRS UMR6502,Jean Rouxel Materials Research Institute, F- 44306 Nantes, France
5 INSERM UMR791, Laboratoire d’Ingénierie Ostéo-Articulaire et Dentaire, OTONN PHU4 CHU de
Nantes, 44042 Nantes, France
Topic: Processing & functionality of infant formula & nutritional powders
Dairy industry recovers calcium phosphates from dairy liquids by different technologies and proposes this mineralized ingredient (under powder forms) for several applications especially for the enrichment of different food products in calcium. The objective of this study was to characterize chemically and physically 6 calcium phosphate powders coming from different international industries. All powders were rich in minerals with important quantitative variations in calcium phosphate contents depending on the powder origin. Among the powders, two were different from others because they contained less minerals and were richer in proteins (about 10% of dry matter) identified as whey proteins and lactose (about 60% of dry matter). The chemical characterization of calcium phosphate indicated that the mass ratio calcium/phosphate was closed to 0.7, except for the two powders which have higher or smaller ratios than 0.6-0.7. The profiles of dry particles size determined by laser granulometry and electron microscopy indicated also differences between powders: their sizes varied between less than one µm to several hundred µm. These size differences were attributed to a step of micronisation during the manufacture of some powders. Analyses by infrared spectroscopy (IR) and X-Ray diffraction
(XRD) revealed that the precipitated calcium phosphate is a very poorly crystallized calcium
deficient apatite presenting typical PO4 vibrational bands in IR but no sharp diffraction peak. After the reconstitution of powders in water, all suspensions were at neutral pH and their zeta potentials (surface charge) were always negative (between -15 and -20mV). All these variations of physico-chemical properties between powders will be discussed to understand their functionalities with a special attention paid on their solubilities in different solutions.
F. Gaucheron is a senior research scientist at INRA Rennes (UMR Science and Technology of Milk and Egg) in France. His research concerns the biochemistry of milk products according to different physicochemical conditions and during different technological treatments. He is scientific coordinator and director of several research contracts with academic and industrial partners. Through his research, he has published about one hundred international scientific publications, several book chapters and participated at national and international conferences. He was also coordinator of the collective book "Minerals and Dairy Products" (2004) and assured the organization of the 1st and 2nd International Symposium on "Minerals & Dairy Products" (2008 in France and 2012 in New Zealand). In parallel of his research activity, he transferred his knowledge by teaching (engineering school, Masters, professionals) in France and in different countries all over the world (Mauritania, Cameroun, Pakistan, Brazil, Haiti, Chad, Madagascar, Australia, Moldavia, Kazakhstan, China, New Zealand, Uruguay,…).
