Effect of sodium dodecylsulfate on equilibria of copper complexation

Effect of sodium dodecylsulfate (SDS) on the complexation of copper(II) with iminodiacetic acid (IDA) and ethylene diamine (En) is investigated using pH-metric titration and NMR relaxation together with computer treatment of the results obtained. In the ternary system of Cu(II)-IDA-SDS the competition for Cu2+ ions between the complexing agent and surface active agent (SDS) was found, whereas in the presence of En the ternary associates with monomeric surfactant anions were observed