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A method for direct selenium determination in human blood serum by electrothermal atomic absorption spectrometry (ETAAS) was developed. Total selenium was measured by ETAAS employing 10 g of palladium as matrix modifier in a graphite atomizer with pyrolytically coated tubes and Zeeman background correction. Blood serum was diluted 1+2 with 0.1 % v/v nitric acid and 0.1 % Triton X-100. Pyrolysis and atomization temperatures for palladium modifier are 1100 ºC and 2500 ºC, respectively. Thedoi:10.4172/2150-3494.1000031 fatcat:kmhdlz2k5fc7vgehuumclcavxe