摘要
本文对极弱酸碱固定pH滴定法的原理、方法和应用进行了讨论。已用本法测定4-氨基安替比林和氯化铵,获得满意结果。相对标准偏差0.21％和0.17％,回收率99.3—99.9％。
A new, precise, accurate, simple, analytical methode of very weak acids-and bases, pH-fixed titration, was reported in this paper. It utilizes the partial dissociation of acids or the partial protonation of weak bases and does not require knowledge of the equilibrium constants or the titrant concentrations. The present method has been used for the determination of 4-aminoantipyrine and ammonium chloride. The relative deviation is less than 0.2% and the rate of recovery is 99.3～99.9%.
