Comments on “innovative method for carbon dioxide determination in human postmortem cardiac gas samples using headspace-gas chromatography-mass spectrometry and stable labeled isotope as internal standard” by Varlet et al.

- We comment on the validation results of the method for CO2 analysis in cardiac samples.
- We demonstrate that the total error of the method exceeds the acceptance limits.
- We show that the method is not valid according to the new SFSTP guideline.