Amperometric complex-formation titration of traces of alkaline earths.
Alkaline earth metals were determined in microgram quantities by complexometric titration with EDTA, EGTA and DTPA. The end-point was detected by following the anodic wave of the chelating agent at the rotating mercury electrode. All the alkaline earths can be titrated at the microgram level with reasonable accuracy, and calcium may be titrated with EGTA in the presence of a 1000-fold excess of magnesium.
den Boef
G
G
Laboratory for Analytical Chemistry University of Amsterdam Nieuwe Achtergracht 125 Amsterdam-CThe Netherlands.
Freese
F
F
Kramer
M M
MM
Poppe
H
H