利用GC和GC/MS对溢油风化的鉴定

STUDYING THE OIL SPILL WEATHERING AND IDENTIFICATION BY GC AND GC/MS

对重质燃料油泄漏两个月后现场采集的溢油样品进行分析,通过对比可见:各样品的风化程度不一,碳数较低的烷烃明显减少,特征比值C19+20/C21+22和Pr/Ph较为稳定,能很好地指示油样的来源;但C17/Pr和C18/Ph已明显降低.通过对1#油样与泄漏的重质燃料油中芳烃比较可知:芳烃CnB,C0N,C1N,C2N和C3N基本消失,油样与泄漏的重质燃料油中C3D(m/z226)的分布几乎完全一致,说明C3D的分布对溢油鉴定有十分重要意义.

In this paper, GC and GC/MS were used to analyze oil samples from Zhoushan sea 2 months after a heavy fuel oil spill. By comparing saturated hydrocarbons of oil samples with the spilled heavy fuel oil, we concluded that the weathering ratio was different in each sample. The saturated hydrocarbons with low carbon numbers could not be found in 3 samples. The ratios of （C19＋20） / （C21＋22 ） and Pr/Ph had no apparent changes which could indicate the source of the samples. The ratios of C17/Pr, C18/Ph was found to decline . By comparing aromatic hydrocarbon samples with heavy fuel oil, we concluded that C nB, Co N, C1 N, C2 N and C3 N were not found. The distribution of C3 D （ m/z 226） in the samples were almost the same as the spilled heavy fuel oil which meant that the distribution of C3D was well-significant to the oil spill identification.