Open Access Repository der Physikalisch-Technischen Bundesanstalt (PTB-OAR)

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Die PTB ist das Nationale Metrologie-Institut der Bundesrepublik Deutschland.

Diese Datenbank bietet kostenfreien Zugang zu zahlreichen Dokumenten und Faktendatensätzen, die in der PTB entstanden sind. Dazu gehören zum Beispiel die PTB-Mitteilungen, das metrologische Fachjournal der PTB und zahlreiche Dokumente aus dem gesetzlichen Messwesen.

Bitte beachten Sie beim Herunterladen der Publikationen die angegebenen Lizenzbedingungen für die Weiterverwendung.

Alle Ressourcen

Harmonisation of methane isotope ratio measurements from different laboratories using atmospheric samples (2025); Dasgupta, Bibhasvata DOI: 10.7795/120.20251126G
Global inventory of doubly substituted isotopologues of methane (Δ13CH3D and Δ12CH2D2) (2025); M. Defratyka, Sara DOI: 10.7795/120.20251126F
Methane Sources in Cluj-Napoca, Romania: Insights From Isotopic Analysis (2025); Van Es, Jacoline DOI: 10.7795/120.20251126E
Developing calibration and measurement capabilities for atmospheric CH₄ stable-isotope ratios at NMIs/DIs: Metrology for global comparability (2025); Srivastava, Abneesh DOI: 10.7795/120.20251126D
Rapid High-Sensitivity Analysis of Methane Clumped Isotopes (Δ13CH3D and Δ12CH2D2) Using Mid-Infrared Laser Spectroscopy (2025); Zhang, Naizhong DOI: 10.7795/120.20251126C
Performance of Cryogenic Adsorbents for Use in Methane Bulk and Clumped Isotope Analysis (2025); Kueter, Nico DOI: 10.7795/120.20251126B
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. 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 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 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 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
Liste der bei der PTB angezeigten Marken und Herstellerzeichen gemäß § 24 Abs. 6 Waffengesetz (WaffG) (2025); Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 1.3 "Geschwindigkeit" DOI: 10.7795/520.2025102824
Liste der bei der PTB zugelassenen Blockiersysteme für Erbwaffen gemäß § 20 Waffengesetz (WaffG) (2025); Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 1.3 "Geschwindigkeit" DOI: 10.7795/520.2025102820

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