Figure 1: Plot of log Kexmix versus log ([Ba2+][L]NB[Pic]) for the extraction of BaPic2 by L = 18C6 into NB. A broken line shows a regression one with R = 0.965 analyzed by Equation (5). Its analysis yielded KD,Pic = 0.20 ± 0.02 and Kex/ mol−3 dm9 = (5.6 ± 1.0) × 1010.