Determination of sulfur in gasoline by inductively coupled plasma atomic emission spectrometry
LIU Lin, WANG Wei, GONG Hou-liang, LIU Yuan-qing, SHI Zong-you
Panzhihua Municipal Testing Instiute for Surpervision of Quality of Commercial Products,National Quality Supervision and Testing Center of Vanadium and Titanium Products,Panzhihua 617000,China
The gasoline sample was diluted with aviation kerosene. S 180.669 nm was selected as the analytical line. The oxygen was introduced using oxygen refrigeration rotary spray chamber with baffle. The spray chamber was cooled to eliminate the influence of carbon deposition and stabilize the plasma. The determination method of sulfur in gasoline by inductively coupled plasma atomic emission spectrometry (ICP-AES) was established. The effect of dilution ratio and oxygen flow rate on determination results was focused on. The optimal analytical conditions were obtained: the dilution ratio was 1:9, and the oxygen flow rate was 80 mL/min. The interference of organic matrix was corrected by multi-component spectral fitting (MSF). The detection limit of method was 0.15 mg/kg. The content of sulfur in two gasoline samples was determined according to the experimental method. The relative standard deviations (RSD, n=10) were less than 1%. The content of sulfur in five gasoline samples was determined by the proposed method and standard methods (GB/T 11140—2008 and SH/T 0689—2008), and the found results were consistent.
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LIU Lin, WANG Wei, GONG Hou-liang, LIU Yuan-qing, SHI Zong-you. Determination of sulfur in gasoline by inductively coupled plasma atomic emission spectrometry. , 2016, 36(8): 60-64.
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