本文在空气-乙炔焰中,藉加入有机络合剂以提高能形成难离解氧化物的稀土的灵敏度,作了初步尝试。以镱为例,研究了含配位原子氮、氧的络合剂对镱的增感效应,镱原子在火焰中的分布,普通元素、非镱稀土和无机酸的干扰及其消除,从而确定了测定镱的最佳条件。灵敏度达0.17ppmYb/1％吸收。应用于合成样品中镱的测定,结果满意。 In the air - acetylene flame, this paper attempts to increase the sensitivity of rare earths that can form refractory oxides by adding organic complexing agents. Taking ytterbium as an example, the sensitization effect of complexing agents containing nitrogen and oxygen with coordination atoms on ytterbium, the distribution of ytterbium atoms in flame, the interference of common elements, non-ytterbium rare earths and inorganic acids and their elimination were studied. The best determination of ytterbium conditions. Sensitivity of 0.17ppmYb / 1% absorption. Applied to the determination of ytterbium in synthetic samples with satisfactory results.