Determination of selenium in manganese powders by hydride generation-atomic fluorescene spectrometry

After the sample was dissolved in nitric acid,a method for determination of selenium in manganese powder was established by hydride generation-atomic fluorescence spectrometry(HG-AFS) with the acidity of hydrochloric acid at 0.72mol/L and the concentration of potassium borohydride of 10.0g/L.The interference from the coexisting ions in the sample solution was investigated and it was found that Mn2+,Al 3+,Fe3+,Si?,Cu2+,Mg2+,Pb2+and Ca2+did not interfere with the determination of selenium.The linear range of this method was 0.20-100.0μg/L with correlation coefficient of 0.999 6and the instrument detection limit was 0.059 6μg/L.When the method was applied to determination of selenium in manganese powder samples,the results were consistent with those obtained by inductively coupled plasma atomic emission spectrometry,the relative standard deviations(n=4) were in the range of 1.9%-3.4%and the recoveries were in the range of 95%-102%.