Determination of EDTA by catalytic amperometric and catalytic potentiometric titration at a small constant current

Kinetic determinations and some kinetic aspects of analytical chemistry

“…Excess of titrant (thorium ions) triggers the indicator reaction, that of hydrogen peroxide and iodide, whose rate can be followed amperometrically, potentiometrically (at a small constant current), or spectrophotometrically. The same authors described the application of amperometric and potentiometric detection to follow the course of titrations with catalytic end-point indication (46). This was illustrated with the titration of EDTA using copper(II) as catalytic titrant and the decomposition of hydrogen peroxide in basic medium as indicator reaction.…”

Amperometric, bipotentiometric, and coulometric titration

“…Submicromolar concentrations of copper, calcium, and thorium have been titrated by the pulse polarographic technique (72). The amperometric titration of ammoniacal EDTA with CuCl2 has been described (87). H202 is added as electrochemical indicator.…”