Titer Determination of Calcium Chloride

The application note describes a potentiometric and Photometric method for the titer determination of CaCl₂ by different procedure i.e.

1.  by using H₂EDTA-Na₂ as the secondary standard
2.  by using solid disodium hydrogen phosphate as primary standard
3.  by performing a photometric titration using EDTA-Na₂ and a DP5 Phototrode

Background

Calcium chloride, CaCl2 is used as a titrant for various determinations such as anions like sulfate,phosphate by precipitation titration, as well as in complexometric titrations to determine the content of complexing agent such as e.g. EDTA. To accurately determine the sample content it is important to know the exact concentration of the titrant, i.e., its titer. Hence, titer determination is the process of determining the actual concentration of the titrant against a primary standard and also to ensure the system suitability of instrument.

The potential change is monitored with a Ca²⁺ half-cell ISE in combination with a reference sensor, and in another procedure by performing a photometric titration using EDTA-Na₂ and a Photometric sensor.

This application note includes:

• Introduction
• Sample Preparation and Procedures
• Solutions and Chemicals
• Chemistry
• Instruments and Accessories
• Method in Detail
• Results and Remarks

And method files (.lmt and .xml) for direct import and implementation on the instrument.