论文部分内容阅读
偶氮氯膦Ⅲ可以在强酸介质中与稀土元素形成有色络合物,但试剂本身水溶液也有较深的颜色,影响光度法测定的灵敏度,本文应用双波长光度分析法的特点在pH1.5的强酸介质中使试剂与稀土元素显色直接测定稀土总量,经实验证明其吸光度可提高60％与文献报道相符。用721型分光光度计进行双波长光度法测定有利于普遍推广应用。
Chlorophosphonazo Ⅲ can form a colored complex with rare earth elements in strong acid medium, but the reagent itself has a darker color in aqueous solution, which affects the sensitivity of spectrophotometry. In this paper, the characteristics of dual wavelength spectrophotometry are studied at pH 1.5 Reagents and rare earth elements in the strong acid medium for the direct determination of the total amount of rare earth, the experimental results show that the absorbance can be increased by 60% in line with the literature. Using the 721 spectrophotometer dual-wavelength spectrophotometry is conducive to the widespread application.