1. Hunan Provincial Engineering Research Center for Ginkgo biloba, Hunan University of Science and Engineering, Yongzhou 425100, China
2. Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Changsha University of Science and Technology, Changsha 410114, China
3. State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China