Dialysis of milk

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Abstract
There is as great a variation in the reported dialyzable Ca of milk as in the P. Static dialysis of "av." bulk milk shows that a decrease in pH (by bacterial action) and an increase in pH (by dilution) both result in an increase in dialyzable Ca and inorganic P. Lack of suitable acidity control and appreciation of dilution effects in different dialysis methods is largely responsible for variations in results in the literature. Heat decreases the dialyzable Ca and inorganic P; dialyzable organic P is unaffected by these effects. The range of dialyzable constituents of "av." milk expressed as % of each originally present is: Ca, 25-33%; total P, 43-51%; inorganic P, 33-41%.

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