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[Objective] To study the effect of drying methods on the content of ferulic acid in different parts of Ligusticum chuanxiong Hort stem and leaf. [Method] The content of ferulic acid in L. chuanxiong stem and leaf was determined by HPLC. [Result]There was a good linear relationship between the concentrationand peak area of ferulic acid when the sample injection ranged from 0. 011 48 to 0. 114 8 μg ( r = 0. 999 9) . The average recovery was 100. 1% with the RSD of 1.18% ( n = 9) . The content of ferulic acid in naturally sun-dried L. chuanxiong leaf and stem was 0. 005 4% with the RSD of 1. 55% ,while that was 0. 008 0%with the RSD of 1. 80% in those dried naturally in the shade and that was 0. 010 5% with the RSD of 1. 07% in those dried naturally after sunshine. As to L. chuanxiong stem and leaf ,oven-drying after sunshine was superior to the above two methods. [Conclusion] Among the three drying methods,oven-drying after sunshine was the optimal one for L. chuanxiong stem and leaf .
[Objective] To study the effect of drying methods on the content of ferulic acid in different parts of Ligusticum chuanxiong Hort stem and leaf. [Method] The content of ferulic acid in L. chuanxiong stem and leaf was determined by HPLC. [Result] There was a good linear relationship between the concentration and peak area of ferulic acid when the sample injection ranged from 0. 011 48 to 0. 114 8 μg (r = 0. 999 9). The average recovery was 100. 1% with the RSD of 1.18% (n = 9). The content of ferulic acid in naturally sun-dried L. chuanxiong leaf and stem was 0. 005 4% with the RSD of 1. 55%, while that was 0. 008 0% with the RSD of 1. 80% in those dried naturally in the shade and that was 0. 010 5% with the RSD of 1. 07% in those dried naturally after sunshine. As to L. chuanxiong stem and leaf, oven-drying after sunshine was superior to the above two methods. [Conclusion] Among the three drying methods, oven-drying after sunshine was the optimal one for L. chuanxiong stem and leaf.