Influence of Solvent Lipid Extraction on Tissue‐Specific Carbon Isotopes
J Groß, B Fry, J Eggebo, S Bengtson Nash · 2026
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Description
Groß and co-authors present a 2026 methods study of how solvent lipid extraction affects carbon isotope readings in animal tissue. Whale blubber and skin are rich in fats, which skew isotope ratios used to study diet. Removing lipids with solvents is standard, but extra effects on carbon values were unstudied.
The team tested repeated extractions on four pure proteins and on humpback whale blubber. The solvents, dichloromethane and methanol, did not significantly change the carbon or nitrogen values of pure proteins. Values stayed within 0.5‰ of unextracted samples, matching expected analytical error. Blubber carbon values rose significantly with each extraction cycle, reflecting fat removal itself. Carbon-to-nitrogen ratios matched pure protein, at 2.87, only after three extraction cycles. The authors conclude gentle single extractions are inefficient, and multiple cycles are needed for robust measures.
Catalog record
| CREATOR | J Groß, B Fry, J Eggebo, S Bengtson Nash |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 37510 |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |