高压消解-ICP-AES法测定燃料油中钒铁镍硅铝钙钠硫

Determination of vanadium,iron,nickel,silicon,aluminium,calcium,sodium,sulfur in fuel oil by steel liner PTFE vessel high pressure digestion-ICP-AES

利用超声波处理制备样品，采用方差分析法进行均匀性检验。以HNO3和H2O2为溶剂，使用钢衬聚四氟乙烯罐高压消解样品，建立了以无机标准溶液制作校准曲线测定燃料油中元素的ICP—AES方法，实现了燃料油中V、Fe、Ni、Si、AI、Ca、Na、S等元素的同时测定。相应各元素的检出限为0．4、0．3、1．4、0．9、1．0、0．7、0．8、150mg／kg；线性范围为1．3～500、0．9～500、4．1～500、2．8～500、3．0～500、2．1～500、2．4～500、450～45000mg／kg。方法的相对标准偏差为0．1％-7．5％，回收率为96％～107％。本方法可以推广到其它相关石油产品中的元素分析。

Analytical Samples were prepared by supersonic treatment, and its homogeneity was tested by variance analysis. Samples were digested with nitric acid and hydrogen peroxide in steel liner PTFE vessels. Vanadium, iron, nickel, silicon, aluminium, calcium, sodium and sulfur in fuel oil were simuhanously tested by ICP-AES according to the calibration curve of inorganic standard solution. The detection limits of above-mentioned elements were 0.4, 0.3, 1.4, 0.9, 1.0, 0.7, 0.8, 150 mg/kg, linear range of them were 1.3 - 500, 0.9 - 500, 4.1 - 500, 2.8 - 500, 3.0 - 500, 2.1 - 500, 2.4 - 500, 450 - 45000 mg/kg, respectively. RSDs were in the range of 0.1% - 7.5%, and recoveries were between 96 percent and 107 percent. This method has been extended to analyze elements in other oil products.