title: Atomic weights: not so constant after all.
authors.affiliation: Max Planck Institute for Biogeochemistry, Jena, Germany. wbrand@bgc-jena.mpg.de
authors.forename: Willi A
authors.initials: WA
authors.lastname: Brand
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000295:instrumentation / Q000379:methods*; D004602:Elements; D007554:Isotopes / Q000032:analysis*
chemical_list: D004602:Elements; D007554:Isotopes