pH-Spectrum of
EDTA-Calcium-Complex



recorded by Dr. G. Mermigidis

Experimental:

System Ca - (1.0 mmol/L CaCl2 / dist. water),
System (Ca+E) - (1.0 mmol/L CaCl2 + 1.0 mmol/L EDTA / dist. water),
System (Ca+E) - (2.0 mmol/L CaCl2 + 1.0 mmol/L EDTA / dist. water)

Results:

Fingerprint

System Ca: No formation of Ca-OH-complex in the pH range from 2 to 12 could be shown.

Systemprint

System (Ca+E): At pH 8.2 a EDTA-Ca complex is formed.

Systemprint with Additive, helps you to check the influence of an Additive

System (Ca+E): No additional peak appears.

If you have any question please do not hesitate to contact us.