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本文研究了浓盐溶液中极弱碱(NaAc、苯胺、六次甲基四胺、吡啶)的控制电流示波电位滴定。W电极是最好的指示电极,NaCl、LiCl是最好的外加盐。不外加电流时,很难对极弱碱进行示波电位滴定。在有微小电流(0.18-1μA)通过指示电极的情况下,可以进行微分示波电位滴定和两电极上的示波电位滴定。同经典电位滴定法相比,这些方法具有快速、简单、直观等优点。
In this paper, the control current oscillotential titration of very weak base (NaAc, aniline, hexamethylenetetramine, pyridine) in concentrated salt solution was studied. W electrode is the best indicator electrode, NaCl, LiCl is the best addition salt. No external current, it is very difficult for very weak base oscillometric potentiometric titration. Differential micro-oscillometric potentiometry and oscillometric potentiometry on both electrodes can be performed with a small current (0.18-1μA) through the indicator electrode. Compared with the classical potentiometric titration, these methods have the advantages of fast, simple and intuitive.