Determination of silicon in the silicon calcium alloy by N_2O-C_2H_2 flame atomic absorption spectrometry

A new method for the determination of silicon in the silicon calcium alloy by N_2O-C_2H_2 flame atomic absorption spectrometry was studied. In the optimum measuring conditions, a good linear range of 0-50 μg/mL is presented for silicon. The detection limit is 0.05 μg/mL. The method has the advantages of high sensitivity, simple operation,less interference and good seletivity. It achieved the requirement of qualities control for instrument analysis and has been used to the determination of silicon in silicon calcium alloy with the RSD less than 1% and the results are agreement with the certified values.