Since 2000, our laboratory at Indiana University has provided materials for stable isotope analyses for the global research community. We sincerely thank our supporters and would like to hear from you if you have questions or suggestions with regard to existing or potential future reference materials. Feedback from endusers helps us maintaining high quality service.
Hydrogen, Carbon, Nitrogen, and Oxygen Stable Isotope Reference Materials
Available Compounds with δ-Values
You can see descriptions of the reference materials by clicking on the Available Compounds tab in the side navigation.
More information is provided below in pdf files of available compounds. The first pdf is comprehensive in alphabetical order, whereas the other lists are specific for certain compound classes.
The PDF files on mixtures of n-alkanes (types A, B, and C) and mixtures of fatty acid esters (type F8) are characterized in special columns (on the right) within the lists of n-alkanes and fatty acid esters, respectively.
- Alphabetical listing of all reference materials
- Aromatic reference materials
- Fatty acid esters
- Materials for derivatization
- Nitrogen-containing reference materials
- Reference materials for EA-IRMS
Note: Stable isotope ratios of individual compounds may be subject to slight adjustments over time. For example, the development of new materials routinely employs repeat measurements of older materials together with calibrations using pairs of international standards for anchoring and attenuation of isotopic scales, thus occasionally resulting in amended statistical mean δ-values of older reference materials.