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A new organic reference material,l‐glutamic acid,USGS41a,for δ13C and δ15N measurements − a replacement for USGS41 |
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| Authors: | Haiping Qi Tyler B. Coplen Stanley J. Mroczkowski Willi A. Brand Lauren Brandes Heike Geilmann Arndt Schimmelmann |
| Affiliation: | 1. U.S. Geological Survey, Reston, VA, USA;2. Max‐Planck‐Institute for Biogeochemistry, Jena, Germany;3. Department of Geological Sciences, Indiana University, Bloomington, IN, USA |
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