Objective: To analyze the constituents of essential oil from different processing drynesses of Radix Angelicae Dahuricae.

Methods: Water steam distillation and GC-MS were used. Relative contents were determined by area.

Results: 37 compounds were identified. The constituents of essential oil the constituents from Radix Angelicae Dahuricae by insolation, drying and microwave dryness were similar, but one by dryness after sulfurizing and dryness after perspiring were different.

Conclusion: Dryness after sulfurizing and dryness after perspiring are not fit for the dryness of Radix Angelicae Dahuricae.

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