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Determination of Trace Amount of Selenium and Tellurium in Geological Samples by Hydride Generation Nondispersive Atomic Fluorescence Spectrometry

Guo Xiao-wei  
A hydride generation nondispersive atomic fluorescence spectrometric method has been developed for determination of trace amount of Se and Te in geological samples. Under the optimum conditions selected by the author, the best attainable detection limits of Se and Te are both 0.3 ng. Ferric chloride and thiourea are recommended as the reagents for eliminating interferences. The spectral interference from Bi reported in the literature can be completely overcome by using Te EDL containing tellurium metal and tellurium bromide. In ordinary samples, no seperation is required.
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