摘要
以高锰酸钾为滴定剂，用示波器指示终点，提出了在酸性介质中直接测定僵蚕中活性草酸铵的示波电位滴定方法。该法灵敏度高（可指示８×１０－７ｍｏｌ·Ｌ－１ＫＭｎＯ４的浓度变化）。精密度好（ＲＳＤ＝０．０６％）、简便快速，且不受颜色及混浊等干扰，用于中、日、欧等多国僵蚕品种中草酸铵的直接测定，结果与氯化钙沉淀重量法相差－０．２２～０．７８％。
n oscillographic potentiometric titration method for the direct determination of ammonium oxalate in Muscardine silkworms was developed using potassium permanganate as the titrant in acidic medium and an oscillograph for indicating the end point.This method is sensitive (it can indicate the change of 8×10 -7 mol/L KMnO 4),precise(RSD=0 06%),simple,fast,and is not influenced by solution color and turbidness.It has been applied to the direct determination of ammonium oxalate in different kinds of Muscardine silkworms,and the deviations between the results obtained by this method and those by the gravimetric method using CaCl 2 are -0.22～0 78%。
出处
《分析试验室》
CAS
CSCD
1997年第5期14-16,共3页
Chinese Journal of Analysis Laboratory
基金
安徽省自然科学基金
关键词
示波电位法
滴定
草酸铵
僵蚕
Oscillographic potentiometry
titration
ammonium oxalate
muscardine silkworm
