Fig. 2. Details of ¹⁹F nuclear magnetic resonance spectra of head space samples trapped in dimethyl sulfoxide-d⁶. (A ) Head space sample of enflurane treated with pulverized potassium hydroxide; (B ) head space sample of untreated enflurane. Spectra shown were recorded in proton-decoupled mode; for details of coupling constants, see table 1. ppm = parts per million.