Keywords : Selenium
karbala journal of pharmaceutical sciences,
2011, Volume 2, Issue 2, Pages 189-195
A new approach for the direct determination of selenium by Electrothemal Atomic Absorption Spectrometry (ETAAS) is proposed, the method employs a 1.0cm x 0.3cm Tantalum metal platform placed in graphite tube. The experimental conditions for the determination of Se via this method have been optimized. Pyrolysis and atomization curves are constructed using uncoated graphite tube without and with platform. The calibration curves were linear over the rang 10-50 ng.ml-1 of Se concentration, with relative standard deviation values, at 50 ng.ml-1 level of 1.96%. The accuracy and precision of the method was evaluated by determining recoveries and percentage relative standard deviation using different concentrations of standard solutions of Se. this method was applied successfully for the determination of Se in human blood serum.