Heumann, Klaus G Isotope ratio measurements: new developments and applications. [electronic resource] - Analytical and bioanalytical chemistry Mar 2013 - 2747-8 p. digital Publication Type: Editorial; Introductory Journal Article ISSN: 1618-2650 Standard No.: 10.1007/s00216-013-6705-8 doi Subjects--Topical Terms: Carbon Isotopes--analysisIsotope Labeling--methodsIsotopes--analysisMass Spectrometry--methodsNitrogen Isotopes--analysis