Figure 2: Plot of log Kexmix versus−log {([Cd2+][L]oDCBz[Pic−])}for the Cd(II) extraction with L=18C6 into oDCBz. The dotted line shows a regression one based on Eq. (4a): log Kexmix =log {2.04 × 104+(9.40 × 10-4/[Cd2+][L]oDCBz[Pic−]2)1/2} at R=0.761.