Four ingredients of Ruicao oil were determined gas chromatographically using 20%PEG-20 M as stationary phase and decanol as internal standard at programmed temperature.

• 以GC法测定瑞草油各组分时,采用20%25 PEG-20 M固定相,正葵醇为内标,柱温以每min 4℃从170℃升至210℃。