Author(s)

Satoshi Ikeda, Saya Morioka, Yoshihiro Kudo

Graduate School of Science and Engineering, Chiba University, Chiba, Japan.

Ionic strength conditions in distribution experiments with single ions are very important for evaluating their distribution properties. Distribution experiments of picrates (MPic) with M = Ag(I) and Li(I)-Cs(I) into o-dichlorobenzene (oDCBz) were performed at 298 K by changing volume ratios (V_org/V) between water and oDCBz phases, where “org” shows an organic phase. Simultaneously, an analytic equation with the V_org/V variation was derived in order to analyze such distribution systems. Additionally, the AgPic distribution into nitrobenzene (NB), dichloromethane, and 1,2-dichloroethene (DCE) and the NaB(C₆H₅) ₄ (=NaBPh₄) one into NB and DCE were studied at 298 K under the conditions of various V_org/V values. So, extraction constants (K_ex) for MPic into the org phases, their ion-pair formation constants (K_MA,org) for MA = MPic in the org ones, and standard distribution constants () for the M(I) transfers between the water and org bulk phases with M = Ag and Li-Cs were determined at the distribution equilibrium potential (dep) of zero V between the bulk phases and also the K_ex (NaA), K_NaA,org, and values were done at A^-=BPh^-₄. Here, the symbols K_ex, K_MA,org, and or were defined as [MA] _org/[M⁺][A^-], [MA] _org/[M+]_org [A^-]_org, and [M⁺]_org/[M+] or [A^-]_org/[A^-] at dep = 0, respectively. Especially, the ionic strength dependences of K_ex and K_MPic,org were examined at M = Li(I)-K(I) and org = oDCBz. From above, the conditional distribution constants, K_D,BPh4 and K_D,Cs, were classified by checking the experimental conditions of the I, I_org, and dep values.

Standard Distribution Constants, Volume Ratios, Distribution Equilibrium Potentials, Ionic Strength Dependence, Extraction Constant, Ion-Pair Formation Constant, o-Dichlorobenzene

Ikeda, S. , Morioka, S. and Kudo, Y. (2020) Distribution of Ag(I), Li(I)-Cs(I) Picrates, and Na(I) Tetraphenylborate with Differences in Phase Volume between Water and Diluents. American Journal of Analytical Chemistry, 11, 25-46. doi: 10.4236/ajac.2020.111003.