轻质石油产品硫含量测试方法研究与评价

Research and evaluation of test methods of trace quantities of sulfur in light liquid petroleum products

随着汽车尾气排放标准越来越严格,要求汽车燃料汽、柴油中的硫含量越来越低。作为硫含量测定的仲裁试验方法,石油产品硫含量测定法-燃灯法由于检出限达不到要求,将不再适用。通过对微库仑法和电感耦合等离子体发射光谱法(ICP-AES)法测试硫含量进行研究,得出结论:微库仑法和ICP-AES法均适用于测试轻质石油产品中的微量硫含量,两种方法测试结果一致性很好;ICP-AES法测试精密度相对较高,检出限低。

Along with discharge standards about automobile tail gas is becoming stricter and stricter, the quantities of sulfur in gasoline and diesel used in automobile as fuel will be cut down greatly. As for arbitration test, the determination of sulfur-lamp method will be not suitable any more. This article researched on determination of sulfun-micro-coulometry method and ICP-AES method and compared the two methods. The research results demonstrate that the two methods are all suitable for trace sulfur deteemination and comsistent in test results. The precision of ICP-AES is high and the MDL is low relatively.