用双波长分光光度法测定稀土和钪在其混合物中的含量

DETERMINATION OF RE AND Sc IN THEIR COMPOUNDS WITH DWS METHOD

氨基C酸偶氮氯膦曾用于稀土胶溶络合物体系。该显色剂在醋酸介质中与各稀土元素及钪形成稳定的络合物。这两种络合物的吸收光谱有明显的差异,利用这些差异,我们应用双波长分光光度法直接分别测定了稀土和钪在其混合物中的含量。方法简便、快速。

Amino-c acid chlorphosphonazo synthesized in our laboratory reacts with both RE and Sc to form colored complexes.The spectra of these complexes are obviously different in their shapes.This paper demonstrates a DWS method to determine the amount of RE(λ_(2)=673.0nm;λ_(1)=689.5nm)and Sc(λ_(2)=626.0nm;λ_(1)=656.0nm)respectively in their compounds.The maximum relative error is 12%.The weight ratio of two oxides are from 1:10 to 10:1.