title: Contributions to the basic problems of complexometry-XXVI determination of calcium in the presence of large amounts of magnesium.
abstract: 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.
authors.affiliation: Analytical Laboratory, J. Heyrovský Institute of Physical Chemistry and Electrochemistry, Czechoslovak Academy of Sciences, Prague 1, Jilská 16, Czechoslovakia.
authors.forename: R
authors.initials: R
authors.lastname: Pribil
authors.forename: J
authors.initials: J
authors.lastname: Adam