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D3: Report describing the development of measurement methods for isotope ratios that are traceable to the SI and summarising the advantages/disadvantages of applying them to more commonly available techniques by providing suitable operation procedures focusing on stable polluting elements
(2025);
Zuliani, Tea ; Žerdoner, Tjaša ; Malinovskiy, Dmitriy ; Engin, Betül ; Prem Pranav, Seena ; et al.
DOI:
10.7795/120.20251212
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Harmonisation of methane isotope ratio measurements from different laboratories using atmospheric samples
(2025);
Dasgupta, Bibhasvata ; Menoud, Malika ; van der Veen, Carina ; Levin, Ingeborg ; Veidt, Cora ; et al.
DOI:
10.7795/120.20251126G
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Global inventory of doubly substituted isotopologues of methane (Δ13CH3D and Δ12CH2D2)
(2025);
Defratyka, Sara ; Fernandez, Julianne ; Adnew, Getachew ; Dong, Guannan ; Douglas, Peter ; et al.
DOI:
10.7795/120.20251126F
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Methane Sources in Cluj-Napoca, Romania: Insights From Isotopic Analysis
(2025);
Van Es, Jacoline ; van der Veen, Carina ; Baciu, Calin ; Hmoudah, Mustafa ; Menoud, Malika ; et al.
DOI:
10.7795/120.20251126E
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Developing calibration and measurement capabilities for atmospheric CH₄ stable-isotope ratios at NMIs/DIs: Metrology for global comparability
(2025);
Srivastava, Abneesh ; Chartrand, Michelle ; Camin, Federica ; Mohn, Joachim ; Sperlich, Peter ; et al.
DOI:
10.7795/120.20251126D
|
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Rapid High-Sensitivity Analysis of Methane Clumped Isotopes (Δ13CH3D and Δ12CH2D2) Using Mid-Infrared Laser Spectroscopy
(2025);
Zhang, Naizhong ; Prokhorov, Ivan ; Kueter, Nico ; Li, Gang ; Tuzson, Béla ; et al.
DOI:
10.7795/120.20251126C
|
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Performance of Cryogenic Adsorbents for Use in Methane Bulk and Clumped Isotope Analysis
(2025);
Kueter, Nico ; Zhang, Naizhong ; Meissner, Jan G. C. ; Monnereau, Léna ; Magyar, Paul M. ; et al.
DOI:
10.7795/120.20251126B
|
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D6: Paper on the status and future direction for CH4 isotope measurements and use of atmospheric transport modelling in verifying Europe’s CH4 emissions and informing policy decisions to 2050 submitted to a peerreviewed journal
(2025);
Ramsden, Alice E. ; Ganesan, Anita L. ; Rigby, Matthew ; Rennick, Chris ; Safi, Emmal ; et al.
DOI:
10.7795/120.20251127F
|
|
D5: Good practice guide for the analysis of CH₄ source gases for δ13C(CH4) and δ2H(CH4) (part1) or Δ13CH3D and Δ12CH2D2 (part 2) by OIRS and IRMS, including sample handling, purification, optimised analytical procedures and traceability to the international standards and target uncertainties δ13C(CH4): 0.2 ‰, δ2H(CH4): 2 ‰, Δ13CH3D: 0.5 ‰, Δ12CH2D2: 2 ‰.
(2025);
x
DOI:
10.7795/120.20251127E
|
|
D4: Report on the analysis of at least two gas mixtures of pure CH4 of varied clumped isotopic composition value assigned for Δ13CH3D and Δ12CH2D2 linked to stochastics by CH4 equilibration
(2025);
x
DOI:
10.7795/120.20251127D
|
|
D3: Report on the methods for creation of a database of isotopic sources in CH4 for use in atmospheric transport modelling exercises
(2025);
Yver-Kwok, Camille ; Röckmann, Thomas ; Dasgupta, Bibhasvata ; Lowry, David ; Fisher, Rebecca ; et al.
DOI:
10.7795/120.20251127C
|
|
D2 - Guidelines on adapting optical isotope ratio measurements of ambient CH4 to field conditions: Maintaining traceability of measurement and common practices for uncertainty calculation, including concept for harmonisation of CH4 field site measurements
(2025);
Witt, Felix ; Safi, Emmal ; Rennick, Chris ; Pearce, Ruth ; Nehrbass-Ahles, Christoph ; et al.
DOI:
10.7795/120.20251127B
|
|
D1: Report on the use of synthetic reference materials in the characterisation and comparison of at least four IRMS and OIRS analysers across a range of amount fractions (1.9-10.0 μmol mol-1 ) and isotope ratios
(2025);
Schmidt, Martina ; Wietzel, Julia ; Feuerle, Marius ; Lowry, David ; Fisher, Rebecca ; et al.
DOI:
10.7795/120.20251127A
|
|
Fractionation of Methane Isotopologues during Preparation for Analysis from Ambient Air
(2025);
Safi, Emmal ; Arnold ; Rennick
DOI:
10.7795/120.20251126A
|
|
D6: Inter-laboratory comparison report, describing sample preparation requirements, sample introduction methods, and uncertainty budgets
(2025);
Chambon, Lucille ; Amaral Saraiva, Marina ; Gupta, Soumya ; Isnard, Hélène ; Jerome, Simon ; et al.
DOI:
10.7795/810.20251106
|
