Materials with known 2H, 13C, 15N and 18O isotopic composition

2H, 13C and 15N

IAEA-602, Benzoic Acid

Unit Size: 1.0 g
Price per Unit: 130 €
Date of Release: 2004

This reference material was prepared by A. Schimmelmann, Indiana University, USA and W. Brand and R. Werner, Max-Planck-Institute for Biogeochemistry, Jena, Germany from commercially procured batches of powdered pure benzoic acid. The material was subsequently isotopically enriched in δ18O by an exchange reaction with δ18O enriched water at elevated temperature. The δ18O value was determined using on-line methods (MPI Jena) and off-line methods (Indiana University). The δ18O value stated is an average determined from both methods. Reports of other laboratories to IAEA on the isotopic values measured are welcome. The δ18O enriched material is generally not suitable for routine δ13C analysis due to the interference of its enriched 17O and 13C content. However, its δ13C value was determined in an international calibration exercise [1].

AnalyteValueUnitSDR/I/C
δ18O+71.4‰VSMOW10.5R
 (R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)
[1] VSMOW scale

References:

  1. Coplen T.B., Brand W.A., Gehre M., Gröning M., Meijer H.A.J., Toman B., Verkouteren R.M. (2006): New Guidelines for 13C Measurements. Anal. Chem. 78, 2439-2441.