紫外荧光法测定轻质油品中总硫含量的影响因素  

INFLUENCE FACTORS ON SULFUR DETERMINATION IN LIGHT OIL BY ULTRAVIOLET FLUORESCENCE SPETROMETRY

作　　者：何沛[1] 褚小立[1] 郑煜[1] 王轶凡[1] 

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《石油炼制与化工》2017年第9期97-102,共6页Petroleum Processing and Petrochemicals

摘　　要：建立了紫外荧光法测定轻质油品中总硫含量的分析方法。使用不同型号的紫外荧光法硫含量测定仪考察了轻质油品中可能存在的氧、氯、氮及常规金属元素对硫含量测定结果的影响。结果表明:紫外荧光法适用于测定甲醇、乙醇燃料汽油、生物柴油及其调合燃料中的硫含量;适用于测定氯质量分数不大于100μg/g的轻质油品中的总硫含量;氮元素对硫含量测定的影响较大,而且不同仪器厂家生产的紫外荧光法硫含量测定仪受氮元素干扰程度不同,当油品中氮质量分数大于100μg/g时,要考虑氮元素对硫含量测定结果的影响;铅、铁、锰质量浓度不大于26mg/L、硅质量浓度不大于100mg/L时对硫含量的测定没有明显影响。The total sulfur content in light oils was determined by ultraviolet fluorescence（UVF）spectrometry and the influence factors of impurities of oxygen,nitrogen,chlorine and metallic elements on the analysis accuracy were investigated by different types of instruments.Results show that oxygen has no influence on the accuracy of determination of sulfur content,indicating that the UVF method is especially suitable for determination of sulfur content of methanol gasoline,ethanol gasoline,biodiesel and biodiesel blends,and also suitable to the light oils with chlorine content less than 100μg/g.It is found that nitrogen has great influence on the accuracy of sulfur determination,and the interference extent relates to the instruments made by different factories.When the nitrogen in samples is more than 100μg/g,the influence of nitrogen must be taken into account.It is also found that no obvious effect is observed in the determination of sulfur content when the content of lead,manganese and iron is no more than 26mg/L or silicon is less than 100mg/L.

关 键 词：紫外荧光 轻质油品 硫 分析方法 

分 类 号：O657.3[理学—分析化学] TE626[理学—化学]