Product tags
Producing Laboratory: TERC
CO2 gas

RM 8562* carbon dioxide was prepared by R. M. Verkouteren, Surface and Microanalysis Science Division, Chemical Science and Technology Laboratory, National Institute of Standards and Technology (NIST) [1,2]. It was first prepared in 1995 from carbon dioxide provided by T. B. Coplen, U.S. Geological Survey (USGS). This gas originated from natural thermal decomposition of a Jurassic limestone deposit in the South-eastern United States and was sampled through a well in 1982 [3]. Its recommended δ13C and δ18O values were determined in international calibrations [4,5].


(SD) Combined standard uncertainty 
(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)
[*] CO2-Heavy, paleomarine origin


  1. VERKOUTEREN, R.M., LAGERGREN, E.S., VELAPOLDI, T.A., Report of Analysis (NIST internal report), 837 698, June 10, 1998; National Institute of Standards and Technology, Gaithersburg, MD (1998).

  2. VERKOUTEREN, R.M., Preparation, characterization and value assignment of carbon dioxide isotopic reference materials: RMs 8562, 8563 and 8564, Anal. Chem. 71 20 (1999) 4740-4746.

  3. STUDLICK, J.R.J., SHEW, R.D., BASYE, G.L., RAY, J.R., "A giant carbon dioxide accumulation in the Norphlet Formation, Pisgah Anticline, Mississippi", Sandstone Petroleum Reservoirs, BARWIS, J.H., McPHERSON, J.G., STUDLICK, J.R.C., Eds.), Springer Verlag, N.Y. (1990) 181-203.

  4. VERKOUTEREN, R.M., KLINEDINST, D.B., Value assignment and uncertainty estimation of selected stable isotope reference materials: RMs 8543-8545, RMs 8562-8564, and RM 8566. NIST Special Publication 260-149, National Institute of Standards and Technology, Gaithersburg, MD (2003).

  5. COPLEN, T.B., BRAND, W.A., GEHRE, M., GRÖNING, M., MEIJER, H.A.J., TOMAN, B., VERKOUTEREN, R.M., New guidelines for 13C measurements, Anal. Chem. 78 7(2006) 2439-2441.