ICP-AES有机进样法测定燃料油中铝、硅、钙、钒、铁、镍含量

采用ICP-AES有机进样法测定燃料油中铝、硅、钙、钒、铁、镍元素。采用航空煤油为稀释剂,按照油/溶剂(质量比)1/9加以稀释后直接进入ICP-AES(电感耦合等离子体发射光谱)仪器测定。方法检出限:钒为0.5μg/g,硅为1μg/g,铝、镍为0.2μg/g,铁、钙为0.05μg/g;相对标准偏差<5%;回收率在88.4%～109.8%之间;与无机灰化-碱熔法(IP 501/05)测定的结果进行了比对,结果基本一致。

Determination of Al,Si,Ca,V,Fe,Ni elements in residual oil by organic direct injection ICP-AES

An organic direct injection inductively coupled plasma method was established for the analysis of Al,Si,Ca,V,Fe,Ni elements in residual oil.Aviation kerosene as diluent,the sample was diluted according to oil/diluent(mass proportion)1/9,and determined by ICP-AES.The detection limits of V was 0.5 μg/g,Al and Ni were 0.2 μg/g,Si was 1 μg/g,Fe and Ca were 0.05 μg/g.The repeatability of the method were less than 5%.The values of recovery were in the ranges of 88.4%～109.8%.The results of both the direct injection method and ashing-fusion method(IP 501/05) were near the same.