2016 Volume 32 Issue 11 Pages 1257-1261
Quantitative analysis of nitrilotriacetate (NTA) in detergents by titration with Cu2+ solution using a copper ion selective electrode was achieved. This method tolerates a wide range of pH and ingredients in detergents. In addition to NTA, other chelating agents, having relatively lower stability constants toward Cu2+, were also qualified with sufficient accuracy by this analytical method for model detergent formulations. The titration process was automated by automatic titrating systems available commercially.