摘要
本文研究了在0.8mol·dm^(-3)高氧酸介质中轻稀土元素铈与二溴硝基偶氮氯膦的显色瓜条件。发现该显色反应在高酸度下具有灵敏度高,选择性好,显色速度快,形成的配合物稳定等优点。利用该显色反应,不需任何分离手续,直接分光光度法测定了纯锋中的微量铈,回收率在96.5%-106.6%之间,结果令人满意。
In this Paper, the color reaction of cerium with Dibromo-p-Nitro Chlorophosphonazo (DBNCPA) in 0.8 mol. dm^(-3) perchloric acid solution is studied. Under the experimental conditions used the reaction gives high Sensitivity((?)=1.1×10~5dm^3. mol^(-1). cm^(-1))and good selectivity, the reaction speed is rapid and the colored complex is stable, this reaction has been utilixed for the direct spectrophetometric determination of trace cerium in the pure zinc, the return efficiency of Ceriumis 97.7-106.6% and the result is satisfactory.
出处
《南京师大学报（自然科学版）》
CAS
CSCD
1991年第2期50-54,共5页
Journal of Nanjing Normal University(Natural Science Edition)
关键词
铈
测定
锌
分光光度法
偶氮氯膦
Dibromo-P-Nitro-Chlorophosphonazo, Trace cerium, Direct spectrophotometry, Puro Zinc.
