Complementary approach for accurate determination of carbon isotopic compositions in γ‐hydroxybutyric acid using gas chromatography/combustion‐isotope ratio mass spectrometry
or exogenous ingestion has been effectively discriminated by carbon isotopic compositions (δ13C values) through gas chromatography/combustion‐isotoperatio mass spectrometry (GC/C‐IRMS). However, an unintended uncertainty of isotopic signatures caused by a wide range of GHB quantities remains unsolved when using only single‐isotope corrections of the di‐TMS derivative.