1. Center of Analysis and Testing; Sichuan Academy of Agricultural Sciences; Chengdu 610066 China
2. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences; Chengdu 610041 China
3. Laboratory of Quality and Safety Risk Assessment for Agro-products (Chengdu); Ministry of Agriculture; Chengdu 610066 China
4. Chengdu Institute of Biology, Chinese Academy of Sciences; Chengdu 610041 China