The determination of a new inhalational anaesthetic, sevoflurane, using an internal standard, xenon, by gas chromatography/mass spectrometry/selected ion monitoring.

A novel determination method for a new inhalation anaesthetic, sevoflurane, in a closed circuit in the presence of carbon dioxide absorbents is investigated using gas chromatography/selected ion monitoring with xenon as an internal standard. The decrease rate of sevoflurane with soda lime was 0.22% +/- 0.158/h (mean +/- SD), while that with baralyme was 0.57% +/- 0.115/h (mean +/- SD).