Titer Determination of ½ I2 0.1 mol/L

The application note describes the titer determination of ½ I₂ 0.1 mol/L solution using ascorbic acid as a primary standard.

Background

Ascorbic acid is suggested as primary standard for standardization of iodine solutions since it is weighable solid and available in highly pure form. The standardization involves an iodimetric titration in which iodine reacts with ascorbic acid, oxidizing it to dehydroascorbic acid.

This redox titration is monitored using a DMi140-SC combined platinum ring electrode.

Reaction:

C₆H₈O₆ + I₂ + 2H₂O → C₆H₆O₆ + 2I^- + 2H₃O⁺

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.