论文部分内容阅读
偶氮氯膦—mN(简称—mN)是一种新型稀土显色剂,用其测定稀土总量及铈组分量已有报道。但用试剂进行钍的光度测定未见报道。本文研究了钍—mN络合物的形成条件及其应用于光度分析中的可能性。实验证明,钍与mN络合物在硝酸-磷酸-草酸介质中,形成稳定的络合物,且具有发色快,灵敏度高于偶氮胂—Ⅲ,稳定时间长,温度影响小,对比度大,工作曲线线性范围宽等特点。
Chlorophosphonazo-mN (referred to as-mN) is a new type of rare earth developer, with the determination of the total amount of rare earths and cerium components have been reported. However, photometric determination of thorium with a reagent has not been reported. In this paper, the formation conditions of thorium-mN complexes and the possibility of their application in photometric analysis are studied. Experiments show that thorium and mN complexes in the nitric acid - phosphoric acid - oxalic acid medium to form a stable complex, and has a hair color faster, higher sensitivity than arsenazo-Ⅲ, stable for a long time, the temperature is small, the contrast is large , The working curve of a wide range of linear characteristics.