单波长色散X射线荧光光谱法测定油品硫含量

利用SINDIE 7039型单波长色散X射线荧光光谱仪,按ASTM D 7039—07标准方法,测定原油、汽油、柴油等油品的硫含量,分析了操作及样品条件对测定结果的影响,考察了方法的准确度和精密度,并将测定结果与仲裁标准SH/T 0689—2000或GB/T 17040—2008进行了对比。结果表明,测试环境、样品组成、薄膜及样品盒等操作条件均会影响测试结果;该方法准确度测定相对标准偏差不超过1.7%,精密度测定90#汽油、0#柴油和原油样品的相对标准偏差均不超过1.4%,柴油加标回收率为93.6%~104.6%,与对应仲裁标准的分析结果基本吻合,能够满足ASTM D 7039—07标准的要求。

Determination of sulfur content in oil by using monochromatic wavelength dispersive X-ray fluorescence spectrometry

The sulfur content in crude oil,gasoline and diesel oil was determined by using SINDIE 7039 type monochromatic wavelength dispersive X-ray fluorescence spectrometer according to ASTM D 7039-07 as the standard,the effects of operating and sample conditions on determination results were analysed,the accuracy and precision of the method were investigated,and the measurement results were compared with those by arbitration standard SH/T 0689-2000 or GB/T 17040-2008.The results showed that operating conditions,such as test environment,sample composition,film and sample box,could affect the test results.The relative standard deviations of accuracy determination were less than 1.7％,the relative standard deviations of precision determinations of 90# gasoline,O# diesel and crude oil samples were less than 1.4％,diesel recovery of standard addition was 93.6％-104.6％.The above mentioned results were consistent with those by corresponding arbitration standards respectively and could meet ASTM D 7039-07 standard.