Contributions to the basic problems of complexometry-XXVIII New method for successive determination of calcium and magnesium.
A new method for successive determination of calcium and magnesium is proposed. It is based on the indirect determination of calcium in borax media by back-titration of excess of EGTA with lead nitrate. Magnesium is then determined in ammonia buffer with DCTA. For both titrations Thymolphthalexone is used as indicator. The exceptional role of DCTA in direct titration of magnesium is established experimentally and explained.
Pribil
R
R
J. Heyrovský Institute of Physical Chemistry and Electrochemistry, Czechoslovak Academy of Sciences, Prague 1, Jilská 16, Czechoslovakia.
Adam
J
J