摘要
利用ＫＢｒＯ３与ＫＢｒ的反歧化反应和Ｂｒ２氧化杀虫单体系，提出示波电位滴定法测定杀虫单含量的新方法。在室温条件下，６ｍｏｌ／Ｌ的ＨＣｌ介质中，ＫＢｒＯ３和ＫＢｒ的浓度分别为０．００４２和０．０２１ｍｏｌ／Ｌ时，测定杀虫单含量相对标准偏差在０．２％以内。该方法准确，操作简便，且不受颜色、沉淀等因素干扰，用于杀虫单含量测定，结果与国家标准法中的高效液相色谱法（仲裁法）和非水滴定法相差小于１％。
A new method for determination of Shachongdan by oscillographic potentiometric titration is developed in this paper. It is based on the potential difference between the redox reaction of bromate with bromide and the oxidation reaction of bromate and Shachongdan. When the concentration of hydrochloric acid, bromate and bromide is 6,0 004 2 and 0 021 mol/L respectively, the relative standard deviation is smaller than 0 2% The proposed method is sensitive, simple, fast and indifferent to solution color and precipitation.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
1999年第1期99-100,共2页
Journal of Nanjing Agricultural University
关键词
示波电位法
滴定
杀虫单
化学结构
oscillographic potentiometricy
titration
Shachongdan
