Projects per year
Abstract
The carbon stable isotope ratio of dissolved inorganic carbon (δ13C-DIC) can provide valuable informations on biogeochemical carbon cycles in natural aqueous environments. In most cases, water samples are stored in air free tubes, flushed with a small volume of He headspace and acidified to convert DIC to CO2 gas. The analyses of the C isotopes in the headspace CO2 is then performed by Isotope Ratio Mass Spectrometry (IRMS). Different headspace gas injection and preparation systems (separation of CO2 from interfering H2O and N2 gasses) can be used prior to IRMS analyses: off-line vacuum extraction of CO2, direct manual injection of headspace gas through the GC column of an Elemental Analyser coupled to the IRMS, or automatic gas sampling systems (GasPrep by Nu Instruments, GasBench by Thermo). The aim of this study was to compare two different headspace injection-IRMS systems to determine the isotopic ratio of C in DIC: a manual injection in an elemental analyzer (Flash EA 1112, Thermo) coupled to an IRMS (Delta V plus - Thermo Finnigan) and an automatic gas sampler (GasPrep, Nu Instruments) coupled to an IRMS (Nu Perspective, Nu Instruments). Results show that the automation of the injection in the second configuration significantly provides better accuracy and better reproducibility, and reduces handling time. In addition, the use of an automatic gas sampler provides a new opening in the DIC analysis: simultaneous determination of δ13C-DIC and DIC amount in the sample.
Original language | English |
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Title of host publication | BASIS 2014 meeting, Nijmegen, The Netherlands |
Subtitle of host publication | 27-28/03/2014 |
Number of pages | 1 |
Publication status | Published - 2014 |
Event | Basis (Benelux Assosiation of Stable Isotopes Scientists) 2014 meeting - Nijmegen, Netherlands Duration: 27 Mar 2014 → 28 Mar 2014 |
Conference
Conference | Basis (Benelux Assosiation of Stable Isotopes Scientists) 2014 meeting |
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Country/Territory | Netherlands |
City | Nijmegen |
Period | 27/03/14 → 28/03/14 |
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VLL68: Zeeschelde. Research on the environmental consequences of the Sigmaplan, dredging activities and port expander modules in the Zeeschelde
1/02/11 → 31/10/25
Project: Fundamental
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SRP2: Strategic Research Programme: Tracing and Modelling of Past & Present Global Changes
Claeys, P., Elskens, M., Huybrechts, P., Gao, Y., Kervyn De Meerendre, M., Claeys, P., Baeyens, W. & Dehairs, F.
1/11/12 → 31/10/24
Project: Fundamental