Chicago Stable Isotope Ratio facility

 isotopic standards

C, N, O, H, S  standards

Disclaimer: Last updated 29 January 2012.  Be sure to actually check the CIAAW website (and links--most current), IAEA website, IAEA stable isotope site,  or NIST website (not Chrome friendly) for the latest values!  This is a variation of the CIAAW site's presentation.  Special thanks to Dominic Colosi for layout and sorting.

alas, can not sort tables when using Sites

Blue-highlighted standards are those available in the lab as of the last update (sort on ref).

Red-highlighted standards are out-of-date values.

Red and Blue lines are UofC and some Yale house standards, not commercially available.

Updates listed, large differences highlighted or listed separately.