摘要
探讨了在明胶存在下，铝-溴邻苯三酚红（简称BPR）-乙基紫（简称EV）体系产生的协同显色反应条件。结果表明，在pH4．2～5．2的HAc－NaAc缓冲介质中，铝与BPR－EV形成离子型缔合物的最大吸收峰在615nm处，摩尔吸光系数为4．05×104L·mol-1·cm-1，铝含量在0～10μg／25ml遵循比耳定律．方法选择性好，可用于茶叶和铝锅沸水中铝含量分析，结果令人满意．
The coordinated reaction condition for aluminium-bromopyrogallol red (BPR)-ethyl violet (EV).system with the presense of gelatin was discussed in this paper.It revealed that the maximum absorption peak of associated ion complex formed by a- luminium and BPR-EV is 615nm and the molar absorption coefficient is 4.05×10-4L·mol-1·cm-1,on condition of HAc -NaAc buffer solution with PH4.2-5.2.Beer's Law is obeyed when A1 content is 0-10μg/25ml.This method has a good selectivity and can be used for the determination of trace aluminium in tea and boiled water in aluminium containers.
出处
《干旱环境监测》
北大核心
1997年第3期138-141,共4页
Arid Environmental Monitoring
