本文在空气—乙炔焰中,以镱为例,研究了双络合剂体系对稀土的增感效应。在所试验的络合剂中,发现了三种增感类型——竞争增感、加和增感和协同增感。继而研究了无机酸、普通元素和非镱稀土的干扰及其消除。并确定一些双络合剂体系在提高镱灵敏度的同时,其消除无机酸和共存元素干扰的能力有较大的和普遍的提高。所拟定的方法用于合成试样中镱的测定,结果满意。 In the air-acetylene flame, ytterbium is taken as an example to study the effect of double complexing agent on the sensitization of rare earth. Among the tested complexing agents, three types of sensitization were found - competitive sensitization, additive sensitization and synergistic sensitization. Then the interference of inorganic acids, common elements and non-ytterbium rare earths and their elimination were studied. And to determine some dual complex system to improve the sensitivity of ytterbium, while its ability to eliminate the interference of inorganic acids and coexisting elements have a greater and general increase. The proposed method was applied to the determination of ytterbium in the synthesized sample with satisfactory results.