TY - JOUR T1 - Preconcentration procedure using vortex agitator system for determination of trace levels of cadmium by flame atomic absorption spectrometry JO - Journal of the Brazilian Chemical Society A1 - Chamsaz, Mahmoud A1 - Eftekhari, Mohammad A1 - Atarodi, Atefe A1 - Asadpour, Saeid A1 - Ariani, Maral SN - 0103-5053 UL - 10.1590/S0103-50532012005000026 VL - 23 Y1 - 2012 PB - Brasil ER -