Determination of Calcium and Magnesium in Milk by E.D.T.A. Titration
Open Access
- 1 June 1961
- journal article
- research article
- Published by American Dairy Science Association in Journal of Dairy Science
- Vol. 44 (6) , 1036-1046
- https://doi.org/10.3168/jds.s0022-0302(61)89854-8
Abstract
Five procedures of determining Ca and Mg in milk were compared. A composite method which combined the method of Ling for removal of proteins and phosphates by potassium metastannate, Flaska''s indicator (Eriochrome blue S E) for the Ca determination, his adjustment of pH (with methyl red) in the determination of Ca plus Mg and the method of Jenness, slightly modified (as to pH adjustment), for Ca plus Mg. This method is rapid and convenient; recoveries were essentially 100% for both Ca and Mg. The superiority of the method seems to result from the quantitative removal of proteins and phosphates at low pH (1.6-1.7) and to the sharpness and reproducibility of the Erio-SE mixed indicator in the Ca titration.Keywords
This publication has 2 references indexed in Scilit:
- Erio SE als neuer Indikator zur komplexometrischen Bestimmung von Calcium (und Magnesium) im SerumHoppe-Seyler´s Zeitschrift Für Physiologische Chemie, 1958
- Titration of Calcium and Magnesium in Milk and Milk Fractions with Ethylenediamine TetraacetateAnalytical Chemistry, 1953