Evaluation of electrothermal atomic absorption spectrometry for trace determination of Sb, As and Se in gasoline and kerosene using microemulsion sample introduction and two approaches for chemical modification

摘要: Studies aimed at the development of analytical methods based on electrothermal atomic absorption spectrometry for determination antimony, selenium and arsenic in gasoline kerosene were performed. The goal was to develop sensitive that allow a simple calibration procedure be used through direct correlation between analyte signals measured sample from aqueous standards. This possible by optimization both preparation furnace conditions. platform atomization technique together with chemical modification (ruthenium permanent modifier or Pd/Mg nitrate modifier). Better results obtained when samples introduced as microemulsions prepared surfactant (Triton X-100) rather than introduction detergentless (three component solution). Good sensitivity achieved, which allowed analytes gasoline and µg L−1 range. Linear ranges up three decades observed curves. Laboratory-prepared analyzed good precision recovery.