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Clinical Chemistry, Vol 22, 1084-1088, Copyright © 1976 by American Association for Clinical Chemistry
RH Callicott and PW Carr
Total serum calcium and magnesium may be determined in one thermometric titration, with disodium ethylenediaminetetraacetate as the titrant. A 1-ml serum sample is diluted with 1 ml of tris(hydroxymethyl)aminomethane buffer (pH 8) and titrated at a constant rate with a motorized syringe buret. Results by the thermometric method compared well with those by atomic absorption spectroscopy.
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