氢化物发生-无色散原子荧光光谱法测定镍中痕量铋

Study on the Determination of trace bismuth In Nickel Metal by Hydridegeneration-Atomic Fluorescence Spectrometry

研究了在氨性溶液中，以镧盐为载体，共沉淀分离富集镍中痕量铋，同时与其他元素分离，用氢化物原子荧光光谱法测定镍中痕量铋，系统考察了测定的最佳条件及共存元素对测定的影响，所拟方法操作简便、快速、灵敏度高，检出限为０．００３６μｇ／ｍｌ，样品测定下限为０．００００４５％，当铋含量为０．０００２５％时，测定的相对标准偏差为７．１％，加标回收率在９９．１％～１０５．０％之间。

A method for the Determination of trace bismuth in nickel meal is described.Bismuth is separated from nickelmatrix and other interference elements by lanthanum hydroxide coprecipitation and determined by HG-AFS.The optimum ex-perimental parameters and the effect of coexistent elements on the detemination of trace bismuth are investigated in detail.Thedetection limit of bismuth is 0.45ug/g,and relative standard deviation is 7.1%,The recovery is 99.1%-105%.The procedureis simple,rapid and reproducible.