[Determination of residual organic solvents in Panax notoginseng extracts by capillary gas chromatography with headspace sampling].

Objective: To develop a headspace gas chromatography method for the determination of residual organic solvents in Panax notoginseng extracts.

Methods: The samples were injected into HP-INNOWAX capillary column by headspace sampler and analyzed with FID detector using standard addition method.

Results: There was a good linearity in the experimental concentration (r=0.