2023
DOI: 10.1002/rcm.9623
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Perspective: Hidden biases in isotope delta results and the need for comprehensive reporting

Philip J. H. Dunn,
Grzegorz Skrzypek

Abstract: Measurements of stable‐isotope composition on an isotope‐delta scale can be subject to bias between laboratories or over time within a single laboratory. This bias can arise not just from differences in method protocol but also from changes in reporting guidelines, or even to the isotope‐delta scales themselves. Without a clear description of method protocols, including all sample preparation steps, instrumental parameters and settings, data processing including calibration of results and estimation of measure… Show more

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Cited by 6 publications
(2 citation statements)
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“…The situation was similar for mixture AB2 where LGC employed USGS41a and CIO used USGS41 both with a very similar carbon isotope delta value to mixture AB2 itself for calibration, while the most 13 C‐enriched RM used by JSI was USGS66. Selection of RMs certainly has the potential to result in bias between calibrated carbon isotope delta values 63 …”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The situation was similar for mixture AB2 where LGC employed USGS41a and CIO used USGS41 both with a very similar carbon isotope delta value to mixture AB2 itself for calibration, while the most 13 C‐enriched RM used by JSI was USGS66. Selection of RMs certainly has the potential to result in bias between calibrated carbon isotope delta values 63 …”
Section: Resultsmentioning
confidence: 99%
“…of RMs certainly has the potential to result in bias between calibrated carbon isotope delta values. 63 The two sodium bicarbonate RMs warrant some further discussion. IAEA-303A and -303B were characterized by interlaboratory comparison in 1991 and therefore predate the adoption of the VPDB-LSVEC scale in 2006.…”
Section: Obtained Carbon Isotope Delta Valuesmentioning
confidence: 99%