Surface and Microanalysis Science Division (Chemical Science and Technology Laboratory)
[skip navigation] NIST Time NIST Home About NIST Contact Us A to Z Site Index

NIST Home > MML > Materials Measurement Science Division >

Web-based Tool for Converting Carbon Dioxide Isotope Measurements into Standardized delta-13-C and delta-18-O Values

Described in: Fresenius' J Anal Chem (2001) 370: 803-810

 

Please select the appropriate variables and supply the measurement data:
   *   IAEA recommendation

Number of Reference Materials
Oxygen Isotope Relationship Constant:
Basis for Absolute Oxygen Isotope Abundance Values: S-17
S-18
RM
(To Realize VPDB Scale):
alpha
d-13
(vs. VPDB, ‰)
d-18
(vs. VPDB, ‰)
d-18
(vs. VPDB-CO2, ‰)

RM vs. Working Machine Gas (‰) 

d-45

d-46
Sample vs. Working Machine Gas (‰) 
 
Optional - Sample Name (Max 15 Chars):