1. Key Laboratory of Agro-product Quality and Safety; Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences; Beijing 100081 China
2. Agriculture and Forest College of Science and Technology; Hebei North University; Zhangjiakou 075000 China
3. Agriculture & Animal Husbandry Bureau of Fengnan District; Tangshan 063300 China
4. Agilent Technologies Inc.; Beijing 100102 China