Contributions to the basic problems of complexometry-XXVI determination of calcium in the presence of large amounts of magnesium.
Two methods for the determination of calcium in the presence of very large amounts of magnesium are proposed. Both are based on back-titration of excess of EGTA, Thymolphthalexone being used as indicator. In the one method the titrant is a zinc solution, in the other a calcium solution is used, with a small amount of zinc present for end-point indication. Both titrations can be performed either visually or spectrophotometrically.
Pribil
R
R
Analytical Laboratory, J. Heyrovský Institute of Physical Chemistry and Electrochemistry, Czechoslovak Academy of Sciences, Prague 1, Jilská 16, Czechoslovakia.
Adam
J
J