摘要
在酸性介质中，苯胺与亚硝酸根离子和盐酸萘乙二胺反应生成玫瑰红色偶氮染料，该染料在汞电极上具有良好的吸附性能，并且在氨性缓冲介质中可在汞电极上还原，于－０．５５Ｖ左右产生一灵敏的吸附极谱波。据此，建立了吸附溶出伏安法测定苯胺的方法。当吸附富集时间为３ｍｉｎ时，该法的检测下限为５×１０－９ｍｏｌ／Ｌ，比分光光度法降低了近两个数量级。应用本方法测定了废水中的苯胺，结果满意。
In acidic medium, aniline reacts with nitrite and N (1 naphthyl) ethylenediamine dihydrochloride to produce a pink azo dye. The dye can be effectively adsorbed on mercury electrode and gives a well defined reduction polarographic wave at a potential of -0.55V ( vs . SCE) in ammonia medium. Based on this, a method was established for the determination of aniline by adsorptive stripping voltammetry. The detection limit of the method is 5×10 -9 mol/L for an accumulation time of 3 min, which is nearly two orders of magnitude lower than the spectrophotometric method. The is method has been successfully applied to determine aniline in waste water.
出处
《分析试验室》
CAS
CSCD
1999年第1期38-42,共5页
Chinese Journal of Analysis Laboratory
关键词
吸附溶出伏安法
苯胺
废水
测定
Adsorptive stripping voltammetry
aniline
waste water
