Publication Details |
| Reference Category | Journals |
| DOI / URL | link |
| Title (Primary) | Evaluation of the performance of high temperature conversion reactors for compound-specific oxygen stable isotope analysis |
| Author | Hitzfeld, K.L.; Gehre, M.; Richnow, H.-H. |
| Journal | Isotopes in Environmental and Health Studies |
| Year | 2017 |
| Department | ISOBIO |
| Volume | 53 |
| Issue | 2 |
| Page From | 116 |
| Page To | 133 |
| Language | englisch |
| Keywords | Carbon monoxide; compound-specific isotope analysis; high temperature conversion; GC-HTC-IRMS; isotope measurement; isotope ratio; oxygen-18 |
| UFZ wide themes | RU3; |
| Abstract | In this study conversion conditions for oxygen gas chromatography high temperature conversion (HTC) isotope ratio mass spectrometry (IRMS) are characterised using qualitative mass spectrometry (IonTrap). It is shown that physical and chemical properties of a given reactor design impact HTC and thus the ability to accurately measure oxygen isotope ratios. Commercially available and custom-built tube-in-tube reactors were used to elucidate (i) by-product formation (carbon dioxide, water, small organic molecules), (ii) 2nd sources of oxygen (leakage, metal oxides, ceramic material), and (iii) required reactor conditions (conditioning, reduction, stability). The suitability of the available HTC approach for compound-specific isotope analysis of oxygen in volatile organic molecules like methyl tert-butyl ether is assessed. Main problems impeding accurate analysis are non-quantitative HTC and significant carbon dioxide by-product formation. An evaluation strategy combining mass spectrometric analysis of HTC products and IRMS 18O/16O monitoring for future method development is proposed. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=18485 |
| Hitzfeld, K.L., Gehre, M., Richnow, H.-H. (2017): Evaluation of the performance of high temperature conversion reactors for compound-specific oxygen stable isotope analysis Isot. Environ. Health Stud. 53 (2), 116 - 133 |
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