摘要
研究了在盐酸介质中微量亚硝酸根与天青Ⅰ发生重氮化反应，建立了测量微量亚硝酸根的新方法。方法的线性为０￣２０μｇ／２５ｍｌ，表观摩尔吸光系数为２．２１×１０＾４，方法已用于水中微量亚硝酸根的测定。
It is reported in this paper, that in a HC1 medium, a diazotization takes place between nitrite ion and azureⅠ , leading to an evident decrease of the absorptiviy of azure Ⅰat its absorption maxima 620nm. A linear relationship between the decrease of absorptivity and the concentration of nitrite ion is found between the range 0-20μg of NO2 ion per 25ml. The apparent molar absorptivity is 2. 2×104L·mol-1·cm-1. A method for the determination of nitrite ion is proposed based on this phenomenon and it has been applied to the determination of nitrite ion in water samples.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
1999年第6期260-261,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
