Summary Classical methods and methods based on the use of disodium ethylene-diaminetetra-acetate (EDTA) for the semi-micro determination of calcium and magnesium in milk and milk diffusate are described. With both types of method satisfactory accuracy and precision are attainable. The use of the EDTA methods leads to greater speed and convenience but practice in recognizing the correct titration end-points is necessary.
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Davies et al. (1962) studied this question.
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