【摘要】 研究了在Hg(Ag)、Pt、Sb、W 4种金属电极上的零电流示波双电位中和滴定法。从阳极极化的Hg(Ag)、Pt电极和经蒸馏水浸泡的Sb、W电极中,任取两支相同或相异金属作成的一对电极皆可用于酸碱滴定;对更稀的酸碱,可用一支经阳极极化和一支未极化的电极。该法简单、准确、直观、快速。初步探讨了Cl-影响Hg(Ag)、Pt电极电位滴定曲线的机理。更多还原

【Abstract】 Zero-current oscillographic potentiometric neutralization titration on two indicator electrodes was studied. Any combination of two electrodes from Hg(Ag), Pt (anodized in 0.1mol/dm3 H2SO4 at 1.5V vs. S C E), Sb and W(soaked in distilled water) can be used for 0. 1-0.01mol/dm3 acid-base titrat-ions. For more dilute acid or base solutions, one can use an anodized electrode and an unanodized one. Polyacid can also be titrated. Compared with other methods,this method is simple, accurate, intuitive, rapid and sensitive. The effect of Cl-on Hg(Ag), Pt electrodes during the titration is also discussed.更多还原