Multicomponent NMR self-diffusion measurements on D20 solutions of decylammonium acetate, chloroacetate, and dichloroacetate are reported. The association behavior of ionic surfactant systems, as evaluated for a comparison of individual component diffusion data (quantified in terms of the degree of counterion binding, the cmc, and the nonmicellar amphiphile concentration above the cmc), was found to be distinctly sensitive to the ...