Characterization of crude oil biomarkers using comprehensive two-dimensional gas chromatography coupled to tandem mass spectrometry
Oil samples from Recôncavo basin (NE Brazil), previously analyzed by traditional techniques such as gas chromatography coupled to tandem mass spectrometry, were evaluated using comprehensive two‐dimensional gas chromatography coupled to quadrupole mass spectrometry and comprehensive two‐dimensional...
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| Published in: | Journal of separation science Vol. 39; no. 17; pp. 3384 - 3391 |
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| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Germany
Blackwell Publishing Ltd
01-09-2016
Wiley Subscription Services, Inc |
| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Oil samples from Recôncavo basin (NE Brazil), previously analyzed by traditional techniques such as gas chromatography coupled to tandem mass spectrometry, were evaluated using comprehensive two‐dimensional gas chromatography coupled to quadrupole mass spectrometry and comprehensive two‐dimensional gas chromatography coupled to tandem mass spectrometry along with simplified methods of samples preparation to evaluate the differences and advantages of these analytical techniques to better understand the development of the organic matter in this basin without altering the normal distribution of the compounds in the samples. As a result, the geochemical parameters calculated by comprehensive two‐dimensional gas chromatography coupled to tandem mass spectrometry described better the origin, maturity, and biodegradation of both samples probably by increased selectivity, resolution, and sensitivity inherent of the multidimensional technique. Additionally, the detection of the compounds such as, the C(14α‐) homo‐26‐nor‐17α‐hopane series, diamoretanes, nor‐spergulanes, C19–C26 A‐nor‐steranes and 4α‐methylsteranes resolved and detected by comprehensive two‐dimensional gas chromatography coupled to tandem mass spectrometry were key to classify and differentiate these lacustrine samples according to their maturity and deposition conditions. |
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| Bibliography: | Multidisciplinary Studies on Biodegradation - No. 0050.0076286.12.9-4600375576 ark:/67375/WNG-80GP93F8-J istex:C543482051F9745BAD4461D96CF5561AE669192F Figure SM1. Total ion chromatograms obtained by GC-QMS (A1) sample non-biodegraded, (A2) biodegraded sample. Figure SM2. Extracted ion chromatogram m/z 191 sample A2 obtained by GC×GC-QMS, this sample shows high abundance of m/z 191 whereas, sample A1 shown low abundance. Figure SM3. Extracted ion chromatogram m/z 205 sample A2, this sample shows high abundance of 2α-methylhopanes whereas, sample A1 shown low abundance and high abundance of 3β-methylhopane. Cn,3βMH = Cn 3β-methylhopane; Cn,2αMH = Cn 2α-methylhopane; Cn,3βMM = Cn 3β-methylmoretane; Cn,2αMM = Cn 2α-methylmoretane. Figure SM4. Extracted ion chromatogram m/z 217 sample A2, this sample shows presence of C24-iso-propylcholestane whereas the sample A1 did not show. βαSCn = Cn13β,17α(H)- diacholestane (20S); βαRCn = Cn13β,17α(H)- diacholestane (20R); αβSCn = 13α,17β(H)- diasterane (20S); αβRCn = 13α,17β(H)- diasterane (20R); αααSCn = Cn 5α,14α,17α(H)-sterane(20S); αααRCn = Cn 5α,14α,17α(H)-sterane(20R); αββSCn = Cn 5α,14ß,17ß(H)-sterane(20S); αββRCn = Cn 5α,14ß,17ß(H)-sterane(20R). Figure SM5. Extracted ion chromatogram m/z 231, sample A2 shows low abundance of 4α-methylsteranes whereas, sample A1 shown a high abundance. 3β,αααCh(S) = 3β-methyl, 5α(H), 14β(H),17β(H)-cholestane (20S); 3β,αββCh(R) = 3β-methyl, 5α(H), 14β(H), 17β(H)-cholestane (20R); 3β,αββCh(S) = 3β-methyl, 5α(H), 14β(H), 17β(H)-cholestane (20S); 3β,αααCh(R) = 3β-methyl, 5α(H), 14α(H), 17α(H)-cholestane (20R); 2α,αααCh(R) = 2α-methyl, 5α(H), 14α(H), 17α(H)-cholestane (20R); 4α,αααCh(R) = 4α-methyl, 5α(H), 14α(H), 17α(H)-cholestane (20R); 4α,αββCh(R) = 4α-methyl, 5α(H), 14β(H), 17β(H)-cholestane (20R); 4β,αααCh(S) = 4α-methyl, 5α(H), 14α(H), 17α(H)-cholestane (20S); 4β,αααCh(R) = 4α-methyl, 5α(H), 14α(H), 17α(H)-cholestane (20R); 3β,αββEr(S) = 3β-methyl, 5α(H), 14β(H), 17β(H)-ergostane (20S); 3β,αββEr(R) = 3β-methyl, 5α(H), 14β(H), 17β(H)-ergostane (20R); 3β,αααEr(S) = 3β-methyl, 5α(H), 14β(H),17β(H)-ergostane (20S); 2α,αααEr(R) = 2α-methyl, 5α(H), 14α(H), 17α(H)-ergostane (20R); 2α,αααEr(S) = 2α-methyl, 5α(H), 14α(H), 17α(H)-ergostane (20S); 4β,αααEr(S) = 4α-methyl, 5α(H), 14α(H), 17α(H)-ergostane (20S); 4β,αααEr(R) = 4α-methyl, 5α(H), 14α(H), 17α(H)-ergostane (20R); 4α,αββEr(R) = 4α-methyl, 5α(H), 14β(H), 17β(H)-ergostane (20R); 3β,αββStg(S) = 3β-methyl, 5α(H), 14β(H), 17β(H)-stigmastane (20S); 3β,αββStg(R) = 3β-methyl, 5α(H), 14β(H), 17β(H)-stigmastane (20R); 3β,αααStg(S) = 3β-methyl, 5α(H), 14β(H),17β(H)-stigmastane (20S); 2α,αααStg(R) = 2α-methyl, 5α(H), 14α(H), 17α(H)-stigmastane (20R); 2α,αααStg(S) = 2α-methyl, 5α(H), 14α(H), 17α(H)-stigmastane (20S); 2α,αββStg(R) = 2α-methyl, 5α(H), 14β(H), 17β(H)-stigmastane (20R); 4α,αββStg(R) = 4α-methyl, 5α(H), 14β(H), 17β(H)-stigmastane (20R); 4β,αααStg(S) = 4α-methyl, 5α(H), 14α(H), 17α(H)-stigmastane (20S); 4β,αααStg(R) = 4α-methyl, 5α(H), 14α(H), 17α(H)-Stigmastane (20R). Figure SM6. Extracted ion chromatogram m/z 203 sample A2, this sample shows greater abundance of A-norsteranes than the sample A1. CnA-nor = Cn A-norsterane. Table 1. Geochemical parameters calculated by GC-MS/MS; GC×GC-QMS and GC×GC-MS/MS for the oils sample A1 and A2 ArticleID:JSSC4987 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 1615-9306 1615-9314 |
| DOI: | 10.1002/jssc.201600418 |