难熔金属元素的原子化温度比较高,采用通常的空气-乙炔火焰不能测定,需采用温度比较高的火焰。一氧化二氮-乙炔焰除了温度较高以外还有一个特点,在它玫瑰红色的火焰层中有CN和NH基团,这些基团能使金属氧化物变成金属基态原子,具有较强的还原性。我们继铝和硅的测定之后,对钽、钼、钇、钛等元素应用一氧化二氮-乙炔火焰进行了测定。国外在这方面的工作曾有过一些报导,我们在前人工作的基础上,进一步做了一些条件试验。除了一般的仪器工作条件选择以外,对各元素的工作曲线线性范围;介质及酸度的影响;电 Refractory metal elements of the atomization temperature is relatively high, using the usual air - acetylene flame can not be measured, the need to use a relatively high temperature flame. The nitrous oxide-acetylene flame, in addition to the higher temperature, has the characteristic that in its rose-red flame layer there are CN and NH groups which make the metal oxide a metal ground state atom with a strong Reducing. Following the determination of aluminum and silicon, we measured the nitrous oxide-acetylene flame on tantalum, molybdenum, yttrium, titanium and other elements. There have been some reports abroad about the work in this field. Based on the previous work, we further conducted some conditional tests. In addition to general instrument operating conditions, the linear range of the working curve of each element; the impact of medium and acidity; electricity