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Updated: Jun 9, 2026

Sampling and Pretreatment of Tooth Enamel Carbonate for Stable Carbon and Oxygen Isotope Analysis
Published on: August 15, 2018
Error propagation in normalization of stable isotope data: a Monte Carlo analysis.
Grzegorz Skrzypek1, Rohan Sadler, Debajyoti Paul
1West Australian Biogeochemistry Centre, John de Laeter Centre of Mass Spectrometry, School of Plant Biology, The University of Western Australia, 35 Stirling Highway (MO90), Crawley WA 6009, Australia. grzegorz.skrzypek@uwa.edu.au
Accurate isotope composition determination requires careful normalization of mass spectrometer data. Using multiple reference standards and repetitions minimizes normalization errors for reliable stable isotope analysis.
Area of Science:
- Geochemistry
- Analytical Chemistry
- Environmental Science
Background:
- Stable isotope ratio mass spectrometry (SIRMS) is crucial for determining sample isotope composition (delta-value).
- Analytical precision in SIRMS does not guarantee accuracy due to normalization processes.
- Normalization of raw isotope data is essential for obtaining true delta-values.
Purpose of the Study:
- To investigate error propagation during carbon stable isotope data normalization.
- To identify methods for reducing normalization errors in SIRMS.
- To assess the impact of reference standard selection on data accuracy.
Main Methods:
- Monte Carlo simulations were employed to model error propagation.
- Laboratory experiments were conducted using carbon stable isotope analysis.
- Normalization strategies involving varying numbers of reference standards and repetitions were tested.
Main Results:
- Increasing the number of reference standards and their repetitions significantly reduces normalization error.
- A 50% reduction in normalization error is achievable through optimized standard analysis.
- Targeted standard selection can reduce error if sample delta-values are known, but using diverse standards is more practical.
Conclusions:
- Standardization protocols are critical for accurate and consistent stable isotope analysis.
- Consistent use of the same set of reference standards is recommended for specific elements and techniques.
- Variations in standard selection between laboratories can lead to incomparable results.
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