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首页> 外文期刊>American Journal of Analytical Chemistry >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
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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

机译：冠醚萃取1,2-二氯乙烷和硝基苯中一价和二价金属苦味酸的萃取常数的表达没有界面平衡-电位差

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摘要

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.
机译：改进了关于用冠醚（L）提取一价金属苦味酸盐（MPic）和二价金属苦味酸盐（MPic2）到高极性稀释剂中的界面平衡电位差（）的想法。这些潜力已通过一些以前的实验提取数据得到了澄清，这些数据以前用18-冠-6醚（18C6）和苯并18C6提取M = Ag（I），Ca（II），Sr（II）和Ba（II）分为1,2-二氯乙烷（DCE）和硝基苯（NB）。因此，证明了？在许多情况下，以实验方式提取的logKD，Pic的值与根据电荷平衡方程计算得出的值一致或接近，其中符号KD，Pic表示Pic﹣在DCE或NB相中的单个分布常数。另外，实验表明，基于总萃取平衡的萃取常数实际上不包含？功能表达式中的术语。

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