Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

New guidelines for delta13C measurements.

Tyler B Coplen1, Willi A Brand, Matthias Gehre

  • 1U.S. Geological Survey, 431 National Center, Reston, Virginia 20192, USA. tbcoplen@usgs.gov

Analytical Chemistry
|April 4, 2006
PubMed
Summary

Anchoring the delta13C scale with two distinct isotopic reference materials significantly improves measurement consistency by up to 47%. This method enhances the accuracy of carbon isotope ratio analyses for various materials.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Three New Calcium Formate Reference Materials for δ<sup>13</sup>C Measurements and a Redetermination of the R(<sup>13</sup>C/<sup>12</sup>C) Ratio for VPDB Based on Proton Nuclear Magnetic Resonance Measurements.

Rapid communications in mass spectrometry : RCM·2026
Same author

Reaffirming the Consistency of the Original Stock of NBS 19 Limestone and Its Byproduct With Finer Grain Size for δ<sup>13</sup>C and δ<sup>18</sup>O Calibrations-Both Distributed Internationally.

Rapid communications in mass spectrometry : RCM·2026
Same author

Controlled-Release Experiment to Optimize Emission Quantification of H<sub>2</sub> Point Sources.

ACS ES&T air·2026
Same author

Isotopic Fractionation and Masking Effects during Biotransformation of Chlorinated Ethanes.

Environmental science & technology·2026
Same author

Primary activity measurement of an Am-241 solution using microgram inkjet gravimetry and decay energy spectrometry.

Metrologia·2026
Same author

Limited validity of an AI-powered app for dietary assessment in females with obesity.

NPJ digital medicine·2026

Area of Science:

  • Geochemistry
  • Analytical Chemistry
  • Isotope Science

Background:

  • Accurate carbon isotope ratio (delta13C) measurements are crucial for various scientific disciplines.
  • Existing delta13C scales can exhibit inconsistencies, impacting data comparability.
  • Standardization of reference materials is essential for reliable isotopic analysis.

Purpose of the Study:

  • To propose and validate a method for improving the consistency of delta13C measurements.
  • To establish a normalized delta13C scale using specific reference materials.
  • To enhance the accuracy and reliability of carbon isotope ratio determinations.

Main Methods:

  • Anchoring the delta13C scale using two isotopic reference materials with substantial differences in 13C/12C ratios.

Related Experiment Videos

  • Measuring delta13C values of both organic and inorganic materials.
  • Normalizing the scale by assigning consensus values to L-SVEC lithium carbonate and NBS 19 calcium carbonate relative to VPDB (Vienna Peedee belemnite).

    • Main Results:

    • Achieved a 39-47% improvement in the consistency of delta13C measurements.
    • Established a normalized delta13C scale relative to VPDB.
    • Provided consensus values for L-SVEC lithium carbonate (-46.6 per thousand) and NBS 19 calcium carbonate (+1.95 per thousand).
    • Improved uncertainties for other reference material values by up to a factor of two or more.
    • Reported a shifted delta13C value for NBS 22 oil (-30.03 per thousand).

    Conclusions:

    • Anchoring the delta13C scale with well-characterized reference materials significantly enhances measurement consistency.
    • The proposed normalization method provides a more reliable and accurate delta13C scale for diverse materials.
    • This standardization benefits a wide range of research fields relying on precise isotopic measurements.