Objective: To establish the quality standard fnr Dieshangling plasters. Methods : GC was employed in the identification of camphor, borneol and methyl salicylate. GC was applied in the determination of menthol in Dieshangliug plasters using naphthalene as the internal standard. Results: The GC characteristics of camphor, borneol and methyl salicylate were obvious and highly specific. The linear range of menthol was within 0. 032 8-0. 327 8 mg·ml^-1 ( r = 0. 999 98). The average recovery was 100.29% and RSD was 1.78% (n = 7). Conclusion:...