摘要
研究了铽－钆－钛铁试剂协同发光体系的荧光光谱特性，确定了各种试验条件对体系荧光强度的影响。由于钆对铽－钛铁试剂荧光体系有协同发光效应，在铽－钛铁试剂荧光体系中引入适量的钆可使体系的荧光强度提高３０倍，体系的荧光强度与铽的浓度在２．０×１０－９～６．０×１０－６ｍｏｌ／Ｌ范围内呈线性关系，检测限达５．０×１０－１１ｍｏｌ／Ｌ。采用标准加入法测定混合稀土样品中痕量的铽，获得满意结果。
The columinescence effect of terbium Tiron system by gadolinium was discovered and the characteristics of fluorescence spectra of the system were studied in detail.The effect of the experimental conditions on the fluorescence intensity was defined.By adding suitable amount of gadolinium to terbium Tiron system,the fluorescence intensity can be enhaneed about 30 times.The fluorescence intensity is a linear function of the concentration of terbium in the range of 2.0×10 -9 ～6 0×10 -6 mol/L.The detection limit is 5.0×10 -11 mol/L.Standard addition method was used for the determination of terbium in synthetic rare earth sample with satisfactory results.
出处
《分析试验室》
CAS
CSCD
1999年第1期73-75,共3页
Chinese Journal of Analysis Laboratory
