A comparison between high performance liquid chromatography coupling with refractive index detector(HPLC-RID)method and gas chromatography coupling with mass spectrometry(GC-MS) method in terms of determination of aromatics content in diesel,standard recovery rate and blending ac-curacy were conducted. Eight automobile diesel fuels(Ⅵ)samples were tested by the two methods. The results indicated that the blending accuracies of two methods are reliable. The standard recovery rate produces a deviation using HLPC method due to the large amount of components with different structure in real diesel fuels from the model compounds and the difference of response characteristics of the refrac-tive index detector. Somewhat deviations also exist in the content of polycyclic aromatic hydrocarbons and total aromatic hydrocarbons obtained by HPLC.%基于SH/T 0806—2008和SH/T 0606—2005方法,对比采用高效液相色谱示差折光检测器(HPLC)和气相色谱-质谱联用(GC-MS)测定柴油中芳烃含量的分析结果、加标回收率及掺兑测定的准确性,讨论两种方法分析结果的差异性和适用性,并在此基础上对8个国Ⅵ车用柴油样品的芳烃含量进行测定.结果表明,两种方法均具有较好的掺兑准确性,但由于柴油分子组成的复杂性,存在大量与模型化合物结构不同的化合物,HPLC法的加标回收率会受到示差折光检测器响应特性差异的影响而产生偏差,也使得由HPLC法得到的多环芳烃和总芳烃含量存在一定的偏差.
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