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以实际溢油案例中出现的4种油品为对象,利用GC/MS分析手段研究了不同油品之间的正构烷烃、多环芳烃和甾烷萜烷的分布特征和特征比值的一致性。结果表明:(1)不同油品指纹的正构烷烃特征比值CPI,萜烷类特征比值C31αβ(S/(S+R))、C32αβ(S/(S+R))、C33αβ(S/(S+R))、C34αβ(S/(S+R))和甾烷类特征比值C29甾ααα(S/(S+R))差异性不明显,可能会出现一致性;(2)不同油品指纹的多环芳烃特征比值存在明显差异,基本不存在一致性问题;(3)在油指纹鉴别过程中,要考虑到特征比值参数的稳定性,同时考虑不同油品指纹特征比值可能出现的一致性问题。
Taking the four oil products in the actual oil spill cases as examples, the distribution characteristics and the consistency of the characteristic ratios of n-paraffins, polycyclic aromatics and stigane paraffins between different oils were studied by means of GC / MS analysis . The results showed that: (1) The n-alkanes characteristic ratio (CPI) and terpane-alkane characteristic ratios (C / Sα) S + (S + R)), C34αβ (S / (S + R)) and sterane character ratio C29 steroid ααα (S / (S + R)) were not significantly different, (3) In the process of oil fingerprint identification, the stability of the parameter of characteristic ratio should be taken into account, and at the same time, the ratio of fingerprint characteristics of different oil products may be considered Consistency issues.