Wubbolts, Matthijs (2020) ''Developing methods to measure the δ13C and δ18O compositions of extracted CO2-samples from the Amazon region.''. Master's Research Project 1, Energy and Environmental Sciences.
|
Text
mEES_2020_WubboltsMA.pdf Download (904kB) | Preview |
|
![[img]](https://fse.studenttheses.ub.rug.nl/style/images/fileicons/text.png) |
Text
toestemming.pdf Restricted to Registered users only Download (116kB) |
Abstract
''The research project aims at developing methods allowing measurement of the δ13C and δ18O compositions of extracted CO2-samples from the Airbone Stable Isotopes of Carbon from the Amazon (ASICA) project. Methods were developed for two different instruments: an optical spectrometer, the Stable Isotope of CO2 Absorption Spectrometer (SICAS), and the Dual-Optima, an isotope ratio mass spectrometer (IRMS). Since the SICAS only measures CO2 isotopes in ambient air, the extracted CO2 has to be diluted to the atmospheric concentration of ~400 ppm which is done on glass line specifically designed for this purpose. The IRMS can measure CO2 isotopes from the extracted CO2-samples of ASICA. Since the IRMS is water sensitive, and many of the ASICA samples still contain water, a drying step is required. The drying step was developed containing magnesium perchlorate. Results from SICAS and IRMS were analyzed and were compared with each other. It turned out that the SICAS had a satisfactory reproducibility with high precision, and probably high accuracy. The IRMS had large uncertainties in its calibrations caused by the low peak height values, so the results could not be corrected and therefore further analyzed. Without this drying step, the IRMS also gave a good result with acceptable precision and probably good accuracy.''
| Item Type: | Thesis (Master's Research Project 1) |
|---|---|
| Supervisor name: | Meijer, H.A.J. |
| Degree programme: | Energy and Environmental Sciences |
| Thesis type: | Master's Research Project 1 |
| Language: | English |
| Date Deposited: | 12 Nov 2020 11:15 |
| Last Modified: | 12 Nov 2020 11:15 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/23591 |
Actions (login required)
 |
View Item |