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After two decades a second anchor for the VPDB delta13C scale.
Coplen TB, Brand WA, Gehre M, Gröning M, Meijer HA, Toman B, Verkouteren RM; International Atomic Energy Agency. Coplen TB, et al. Rapid Commun Mass Spectrom. 2006;20(21):3165-6. doi: 10.1002/rcm.2727. Rapid Commun Mass Spectrom. 2006. PMID: 17016833 No abstract available.
New guidelines for delta13C measurements.
Coplen TB, Brand WA, Gehre M, Gröning M, Meijer HA, Toman B, Verkouteren RM. Coplen TB, et al. Anal Chem. 2006 Apr 1;78(7):2439-41. doi: 10.1021/ac052027c. Anal Chem. 2006. PMID: 16579631
Comprehensive inter-laboratory calibration of reference materials for delta18O versus VSMOW using various on-line high-temperature conversion techniques.
Brand WA, Coplen TB, Aerts-Bijma AT, Böhlke JK, Gehre M, Geilmann H, Gröning M, Jansen HG, Meijer HA, Mroczkowski SJ, Qi H, Soergel K, Stuart-Williams H, Weise SM, Werner RA. Brand WA, et al. Among authors: coplen tb. Rapid Commun Mass Spectrom. 2009 Apr;23(7):999-1019. doi: 10.1002/rcm.3958. Rapid Commun Mass Spectrom. 2009. PMID: 19263478
Stable isotope deltas: tiny, yet robust signatures in nature.
Brand WA, Coplen TB. Brand WA, et al. Among authors: coplen tb. Isotopes Environ Health Stud. 2012 Sep;48(3):393-409. doi: 10.1080/10256016.2012.666977. Epub 2012 Mar 30. Isotopes Environ Health Stud. 2012. PMID: 22462621
USGS44, a new high-purity calcium carbonate reference material for δ13 C measurements.
Qi H, Moossen H, Meijer HAJ, Coplen TB, Aerts-Bijma AT, Reid L, Geilmann H, Richter J, Rothe M, Brand WA, Toman B, Benefield J, Hélie JF. Qi H, et al. Among authors: coplen tb. Rapid Commun Mass Spectrom. 2021 Feb 28;35(4):e9006. doi: 10.1002/rcm.9006. Rapid Commun Mass Spectrom. 2021. PMID: 33201519 Free PMC article.
Optimization of on-line hydrogen stable isotope ratio measurements of halogen- and sulfur-bearing organic compounds using elemental analyzer-chromium/high-temperature conversion isotope ratio mass spectrometry (EA-Cr/HTC-IRMS).
Gehre M, Renpenning J, Geilmann H, Qi H, Coplen TB, Kümmel S, Ivdra N, Brand WA, Schimmelmann A. Gehre M, et al. Among authors: coplen tb. Rapid Commun Mass Spectrom. 2017 Mar 30;31(6):475-484. doi: 10.1002/rcm.7810. Rapid Commun Mass Spectrom. 2017. PMID: 27984667
52 results