Oil Fingerprint Analysis of Bicyclic Sesquiterpanes by Internal Standard Method and Oil Identification
  
View Full Text    Download reader
DOI:10.3969/j.issn.1004-4957.年份.月份
KeyWord:crude oil  bicyclic sesquiterpanes fingerprint  semiquantitative method
  
AuthorInstitution
杨佰娟,郑立,张魁英,陈军辉,王小如 1.国家海洋局第一海洋研究所海洋生态研究中心;2.青岛科技大学化学与分子工程学院
Hits: 2085
Download times: 1157
Abstract:
      A semiquantitative gas chromatography-mass spectrometric method relative to internal standard was developed for the fingerprinting analysis of bicyclic sesquiterpanes in crude oils.Based on the chromatograms properties,characteristic fragment ions(m/z 123,179,193 and 207) and the calculated retention indices,10 bicyclic sesquiterpanes compounds were identified and the concentration formulas of semiquantitation using the internal standard(d18-decahydronaphthalene) were provided.Bicyclic sesquiterpanes fingerprinting of 9 crude oils collected from Weizhou island,Bohai sea and crude oil from import sources were analyzed.The result revealed the following situation that the total concentrations of bicyclic sesquiterpanes range from 600 μg/g to 8 000 μg/g.The dominating components in all the studied crude oils are C15-sesquiterpane(BS3),C15-sesquiterpane(BS4),C16sesquiterpane(BS8) and 8β(H)-homodrimane(BS10),which account for 60% of total contents of bicyclic sesquiterpanes.The abundances of bicyclic sesquiterpanes in different oils follow an increasing order as Weizhou island > Bohai sea > crude oil from imports G1,G2.The total bicyclic sesquiterpane contents of G3(crude oil of GIRASSOL) and B3(crude oils from Bohai sea) are similar but exhibit different distributions of bicyclic sesquiterpane signatures.Crude oils from different offshore oil platforms in the same block exhibit very similar bicyclic sesquiterpanes signatures;In contrast,oils from different sources have different signatures of both the concentrations and relative distribution patterns of bicyclic sesquiterpanes compounds.Fingerprinting analysis of bicyclic sesquiter-panes in crude oils by semiquantitative method can achieve the identification of different crude oils.
Close