Modelling ion composition in simulated milk ultrafiltrate (SMUF). I: Influence of calcium phosphate precipitation

被引：24

作者：

Gao, R. ^{[1
]}

van Halsema, F. E. D. ^{[2
]}

Temminghoff, E. J. M. ^{[3
]}

van Leeuwen, H. P. ^{[4
]}

van Valenberg, H. J. F. ^{[1
]}

Eisner, M. D. ^{[5
]}

Giesbers, M. ^{[6
]}

van Boekel, M. A. J. S. ^{[1
]}

机构：

[1] Wageningen Univ, Prod Design & Qual Management Grp, NL-6700 EV Wageningen, Netherlands

[2] HaloteC Instruments BV, NL-3905 KX Veenendaal, Netherlands

[3] Wageningen Univ, Dept Soil Qual, NL-6708 PB Wageningen, Netherlands

[4] Wageningen Univ, Lab Phys Chem & Colloid Sci, NL-6703 HB Wageningen, Netherlands

[5] FrieslandCampina Innovat Europe, NL-6709 PA Wageningen, Netherlands

[6] Wageningen Univ, Organ Chem Lab, NL-6703 HB Wageningen, Netherlands

来源：

FOOD CHEMISTRY | 2010年 / 122卷 / 03期

关键词：

Calcium phosphate; Precipitation; Ion equilibria; Ion-speciation model; SMUF; DONNAN MEMBRANE TECHNIQUE; SALT SOLUTION; PH; 50-DEGREES-C; EQUILIBRIA; SPECIATION; ADDITIVES;

D O I：

10.1016/j.foodchem.2010.03.040

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Freshly prepared simulated milk ultrafiltrate (SMUF) is a solution that is supersaturated with respect to various calcium phosphate phases that precipitate in time. As a consequence, the ion composition of equilibrated SMUF was found to be significantly different from that of freshly prepared SMUF. This study proposes a thermodynamic ion-speciation model that is able to describe ion equilibria in SMUF. Moreover, it is also able to describe calcium phosphate precipitation in fresh SMUF on its way to equilibrium by using an apparent solubility product for CaHPO4 center dot 2H(2)O as a function of time. The model was validated by experiments in which CaCl2 and Na2HPO4 were added to freshly prepared SMUF. The changes in calcium activity and pH were followed and the precipitates were characterised by X-ray diffraction. The model was able to predict the observed changes. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：700 / 709

页数：10

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