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has been cited by the following article:

• TITLE: On an Expression of Extraction Constants without the Interfacial Equilibrium-Potential Differences for the Extraction of Univalent and Divalent Metal Picrates by Crown Ethers into 1,2-Dichloroethane and Nitrobenzene

  AUTHORS: Yoshihiro Kudo, Shoichi Katsuta

  KEYWORDS: Extraction Constants, Distribution Constant of a Single Ion, Interfacial Equilibrium-Potential Differences, 1, 2-Dichloroethane, Nitrobenzene, Metal Picrates, Crown Ethers

  JOURNAL NAME: American Journal of Analytical Chemistry, Vol.6 No.4, March 27, 2015

  ABSTRACT: An idea on interfacial equilibrium-potential differences () which are generated for the extraction of univalent metal picrate (MPic) and divalent ones (MPic2) by crown ethers (L) into high-polar diluents was improved. These potentials were clarified with some experimental extraction-data reported before on the M = Ag(I), Ca(II), Sr(II) and Ba(II) extraction with 18-crown-6 ether (18C6) and benzo-18C6 into 1,2-dichloroethane (DCE) and nitrobenzene (NB). Consequently, it was demonstrated that the values from the extraction-experimentally obtained logKD,Pic ones are in agreement with or close to those calculated from charge balance equations in many cases, where the symbol, KD,Pic, denotes an individual distribution constant of Pic﹣ into the DCE or NB phase. Also, it was experimentally shown that extraction constants based on the overall extraction equilibria do not virtually contain the terms in their functional expressions.