RM 8564* 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 1996 from research grade carbon dioxide (99.995%) obtained from Scott Speciality Gases. This gas originated from the fermentation of C4 biomass (corn) in a grain distillery in the Central United States. Its recommended δ13C and δ18O values were determined in international calibrations [3,4].
| Analyte | Value | Unit | SD | R/I/C |
|---|
| δ13C | -10.45 | ‰VPDB | 0.04 | C |
| δ18O | +0.06 | ‰VPDB | 0.20 | R |
(SD) Combined standard uncertainty
(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)
[*] CO2 -Biogenic, modern biomass origin
References:
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).
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.
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).
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.
