Postmortem changes in alcohol and drug concentrations are well known today. The authors used an HPLC assay of barbiturates in postmortem tissue, and developed a rat model in order to evidence postmortem changes in toxics concentrations. Postmortem changes in secobarbital concentrations were evidenced using a rat-secobarbital model. This work emphasizes the difficulty of postmortem toxicology, as concentrations found at the time of autopsy may be different from concentrations at the time of death.
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Quatrehomme et al. (1994) studied this question.
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