摘要
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。
Controlled current oscillographic potentiometric titration of very weak bases (NaAc, aniline, hexamethylenetetramine, pyridine) in concentrated salt solutions with hydrochloric acid was studied. The best salt is NaCl or LiCl, and the best indicator electrode is W electrode. At zero current, these bases cannot be titratcd by oscillographic potentiomctric titrimetry. When a small current (0.2-1μA) is passed through the indicator electrode, electrode potentials stabilize more rapidly. Derivative oscillographic potentiometric titration and oscillographic potentiometric titration on two indicator electrodes can be performed. Compared with potentiometric titration, these methods are rapid, simple and intuitive.
出处
《南京大学学报（自然科学版）》
CAS
CSCD
1989年第4期723-727,共5页
Journal of Nanjing University（Natural Science）
关键词
浓盐
极弱碱
示波电位滴定
concentrated salt, very wcak bases, oscillographic potentiomctric titration
