Examples of Amperometric Titration:
Determination of Zinc with EDTA Reagents required
i) 0.005 M zinc ion solution
ii) 0.01 M EDTA solution
iii) Cyclohydoxylamine
The titrant should be lean 10 times strong than the ion taken in the cell. Procedure: Place 5.00 cm3 of zinc ion solution in the titration cell, add 1.0 cm3 of cyclohexylamine or 19.0 cm3 of distilled water and set the applied potential at -1.4 V vs SCE corresponding to Zn2+. Deaerate the solution and titrate with standard EDTA solution. Pass N2 for 1 minute after that take readings of both burette and the galvanometer. Huge initial current will be decreased as the titration proceeds to a extremely small value at the equivalence point and remains constant beyond the equal point. Use volume correction and plot the readings. The graph is as display in the titration curve. (1 ml of 0.01 M EDTA of Zn = 0.0006537 g of Zn.)