本文选用镧或钾钇混合物作为抑制剂,克服了共存的十四种稀土和六种非稀土元素的干扰。样品溶解后,加入适量的抑制剂,即可用一氧化二氮-乙炔火焰原子吸收光谱法直接测定氧化钇中钬和铒,不需要任何化学分离手续。方法简便、快速、准确。钬的回收率为98-103％,铒的回收率为95-102％。相对标准偏差,钬为0.9％,铒为1.9％。该法已用于纯制氧化钇的工艺流程分析,结果令人满意。 1.仪器及最佳的工作参数: SP1900原子吸收分光光度计(英国)。钬、铒空心阴极灯(美国P-E公司)。 WM-2型无油气体压缩机。自制一氧化二氮气体(纯度95％以上)。仪器最佳工作参数列于表1。 2.工作曲线的绘制:取不同量的标准溶液(0-1毫克)于10毫升容量瓶中,加入适量的钾 In this paper, we choose lanthanum or potassium-yttrium mixture as inhibitor to overcome the coexistence of fourteen kinds of rare earth and six non-rare earth elements interference. After the sample is dissolved, an appropriate amount of inhibitor can be added to directly determine holmium and erbium in yttrium oxide using nitrous oxide-acetylene flame atomic absorption spectrometry without any chemical separation procedure. The method is simple, fast and accurate. The recovery of holmium was 98-103% and the recovery of erbium was 95-102%. The relative standard deviations were 0.9% for holmium and 1.9% for erbium. The method has been used in pure yttrium oxide process analysis, the results are satisfactory. 1. Instruments and the best working parameters: SP1900 atomic absorption spectrophotometer (UK). Holmium, erbium hollow cathode lamp (the United States P-E company). WM-2 oil-free gas compressor. Homemade nitrous oxide gas (purity of 95% or more). The best working parameters of the instrument are listed in Table 1. 2. Draw the working curve: Take different amount of standard solution (0-1 mg) in 10 ml volumetric flask, add the appropriate amount of potassium