摘要
本文研究了DBC-偶氮胂与稀土元素显色反应的条件。在1-2N HCl介质中,反应瞬时完成,络合物最大吸收峰位于630nm处,反应灵敏度高(对轻稀土ε_(630)=1.30×10^(5)L·Mol^(-1)·cm^(-1))选择性好,铁矿中常见共存元素不干扰测定稀土总量。RE_(2)O_(3)在0-25微克/25毫升范围内符合比尔定律。直接光度法测定铁矿标样中稀土总量,结果满意。
The colour reaction of REE with DBC-arsenazo has been studied.The colour complex(Amax=630nm)was formed in a solution of 1-2 N HC1 medium.Beer’s law is obeyed over the range from O to 25μg RE_(2)O_(3)/25ml.The method was sensitive(ε_(630)=1.1-1.3×10^(5)1·mol^(-1)·cm^(-1)),selective and accurate.It was applied to determine the total rare earth in iron ores with satisfactory results.
作者
何久康
其木格
He Jiu-Kang;Qi Mu-Ge(Department of Chemistry Inner Mongolia University)
出处
《岩矿测试》
CAS
1988年第3期207-208,I0006,共3页
Rock and Mineral Analysis
