Separation of 18α(H)-, 18β(H)-oleanane and lupane by comprehensive two-dimensional gas chromatography
18α(H)-, 18β(H)-oleanane and lupane are angiosperm-derived biomarkers that are used as age indicators for the Late Cretaceous onwards when the first proliferation of angiosperms occurred. In addition, the 18α(H)-/18β(H)-oleanane ratio is employed as a thermal maturity parameter of crude oil. However...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
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Elsevier
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/34919 |
| _version_ | 1848754354316640256 |
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| author | Eiserbeck, C. Nelson, R. Grice, Kliti Curiale, J. Reddy, C. Raiteri, Paolo |
| author_facet | Eiserbeck, C. Nelson, R. Grice, Kliti Curiale, J. Reddy, C. Raiteri, Paolo |
| author_sort | Eiserbeck, C. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 18α(H)-, 18β(H)-oleanane and lupane are angiosperm-derived biomarkers that are used as age indicators for the Late Cretaceous onwards when the first proliferation of angiosperms occurred. In addition, the 18α(H)-/18β(H)-oleanane ratio is employed as a thermal maturity parameter of crude oil. However, evidence has shown that accurate quantification of these compounds has been impeded by inadequate chromatographic separation by traditional one-dimensional gas chromatography. In this study, we present the separation of 18α(H)-, 18β(H)-oleanane and lupane with comprehensive two-dimensional gas chromatography (GC x GC). Furthermore, it was observed that 18β(H)-oleanane elutes earlier than 18α(H)-oleanane in second dimension (polarity) which we attribute to steric hindrance effects. Two GC conditions have been developed in order to achieve baseline separation of the triterpenoids of interest in complex mixtures such as sediment extracts and crude oils. |
| first_indexed | 2025-11-14T08:39:04Z |
| format | Journal Article |
| id | curtin-20.500.11937-34919 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:39:04Z |
| publishDate | 2011 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-349192017-09-13T15:51:39Z Separation of 18α(H)-, 18β(H)-oleanane and lupane by comprehensive two-dimensional gas chromatography Eiserbeck, C. Nelson, R. Grice, Kliti Curiale, J. Reddy, C. Raiteri, Paolo Separation Triterpenoids GC x GC-TOFMS Oleanane Comprehensive two-dimensional gas-chromatography Lupane 18α(H)-, 18β(H)-oleanane and lupane are angiosperm-derived biomarkers that are used as age indicators for the Late Cretaceous onwards when the first proliferation of angiosperms occurred. In addition, the 18α(H)-/18β(H)-oleanane ratio is employed as a thermal maturity parameter of crude oil. However, evidence has shown that accurate quantification of these compounds has been impeded by inadequate chromatographic separation by traditional one-dimensional gas chromatography. In this study, we present the separation of 18α(H)-, 18β(H)-oleanane and lupane with comprehensive two-dimensional gas chromatography (GC x GC). Furthermore, it was observed that 18β(H)-oleanane elutes earlier than 18α(H)-oleanane in second dimension (polarity) which we attribute to steric hindrance effects. Two GC conditions have been developed in order to achieve baseline separation of the triterpenoids of interest in complex mixtures such as sediment extracts and crude oils. 2011 Journal Article http://hdl.handle.net/20.500.11937/34919 10.1016/j.chroma.2011.06.021 Elsevier restricted |
| spellingShingle | Separation Triterpenoids GC x GC-TOFMS Oleanane Comprehensive two-dimensional gas-chromatography Lupane Eiserbeck, C. Nelson, R. Grice, Kliti Curiale, J. Reddy, C. Raiteri, Paolo Separation of 18α(H)-, 18β(H)-oleanane and lupane by comprehensive two-dimensional gas chromatography |
| title | Separation of 18α(H)-, 18β(H)-oleanane and lupane by comprehensive two-dimensional gas chromatography |
| title_full | Separation of 18α(H)-, 18β(H)-oleanane and lupane by comprehensive two-dimensional gas chromatography |
| title_fullStr | Separation of 18α(H)-, 18β(H)-oleanane and lupane by comprehensive two-dimensional gas chromatography |
| title_full_unstemmed | Separation of 18α(H)-, 18β(H)-oleanane and lupane by comprehensive two-dimensional gas chromatography |
| title_short | Separation of 18α(H)-, 18β(H)-oleanane and lupane by comprehensive two-dimensional gas chromatography |
| title_sort | separation of 18α(h)-, 18β(h)-oleanane and lupane by comprehensive two-dimensional gas chromatography |
| topic | Separation Triterpenoids GC x GC-TOFMS Oleanane Comprehensive two-dimensional gas-chromatography Lupane |
| url | http://hdl.handle.net/20.500.11937/34919 |