Characterization of vanillin carbon isotope delta reference materials

Autor: Michelle M. G. Chartrand, Juris Meija, Jean-Francois Hélie, Paul Middlestead, Malarvili Ramalingam, Azharuddin Abd Aziz, Zoltan Mester

Publikováno v: Analytical and Bioanalytical Chemistry. 414:7877-7883

Stable carbon isotope ratio measurements are used to investigate the provenance of vanillin. In this study, a variety of commercial vanillin samples and vanilla products were analyzed to provide a frame of reference for the variability of carbon isot

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ae7a55862605cff5fefbcc519bd3871
https://doi.org/10.1007/s00216-022-04322-x

Discontinuity in the Realization of the Vienna Peedee Belemnite Carbon Isotope Ratio Scale

Autor: Zoltán Mester, Agnieszka Adamowicz-Walczak, Jean-François Hélie, Michelle M.G. Chartrand, Juris Meija, Paul Middlestead

Publikováno v: Analytical Chemistry. 93:10740-10743

By convention, carbon isotope ratios are expressed relative to VPDB defined by the calcite standard NBS19 in the 1980s. [See T. Coplen, Pure Appl. Chem. 1994, 66, 273–276.] To improve the realization of the VPDB scale, a second fixed point (lithium

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae45a3191d01468481f356f19f1cd314
https://doi.org/10.1021/acs.analchem.1c02458

An international intercomparison of stable carbon isotope composition measurements of dissolved inorganic carbon in seawater

Autor: Yuichiro Kumamoto, Gilles Reverdin, Richard Doucett, Elena O. Dubinina, Claire Normandeau, Roxane Bowden, Lin Cheng, Kotaro Shirai, Bethany Theiling, Ulysses S Ninnemann, Pål Tore Mørkved, Paul D. Quay, Paul Middlestead, Barbora Gallagher, Jennifer L. McKay, Douglas W.R. Wallace, Robert van Geldern, David P Gillikin, Daniel Nothaft

Publikováno v: Limnology and Oceanography: Methods
Limnology and Oceanography: Methods, 2019, 17 (3), pp.200-209. ⟨10.1002/lom3.10300⟩
Limnology and Oceanography : Methods
Limnology and Oceanography: Methods, Association for the Sciences of Limnology and Oceanography, 2019, 17 (3), pp.200-209. ⟨10.1002/lom3.10300⟩

International audience; We report results of an intercomparison of stable carbon isotope ratio measurements in seawater dissolved inorganic carbon (δ113C‐DIC) which involved 16 participating laboratories from various parts of the world. The interc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e29f0927d7f105272990982719135602
https://hal.sorbonne-universite.fr/hal-02081570/document

On estimating the precision of stable isotope ratios in processed tree-rings

Autor: Trevor J. Porter, Paul Middlestead

Publikováno v: Dendrochronologia. 30:239-242

Stable isotope dendrochronology is a well-developed field of research, but improvements to methodologies are on-going. We propose an improved method for estimating the precision of stable isotope ratios ( δ ) of tree-ring samples that are processed

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6c8d60386c1e1cf0501c3eadcb64677f
https://doi.org/10.1016/j.dendro.2012.02.001