研究了离子交换分离火焰发射光谱测定钽粉中微量钠、钾。用氢氟酸分解试样,强酸型阳离子交换树脂分离钽,用3mol L盐酸洗脱钠和钾,以空气乙炔火焰分光光度法测定钠和钾。方法简便、快速,不需要特殊的工作环境。分析钽粉中5ppm钠和2ppm钾,20次分析值的相对标准偏差分别为3.9%和10%。 Determination of Trace Sodium and Potassium in Tantalum Powder by Ion Exchange Separation and Flame Emission Spectrometry. Hydrofluoric acid was used to decompose the sample, the strong acid cation exchange resin was used to separate tantalum, sodium and potassium were eluted with 3mol L hydrochloric acid, and sodium and potassium were determined by air acetylene flame spectrophotometry. The method is simple, fast, does not require special working environment. Analysis of tantalum powder 5ppm sodium and 2ppm potassium, 20 times the relative standard deviation of analytical values ​​were 3.9% and 10%.