**About the Editors**

#### **Xianjiang Li**

Dr. Xianjiang Li received his Ph.D. degree from Peking University then worked as a post-doc researcher at National Institute of Metrology (NIM). Subsequently, he worked as a visiting scientist at Bureau International des Poids et Mesures (BIPM). He is a Level 1 certified metrology engineer, as well as being a technical expert in CRM certification. Currently, he works as an associate research fellow at NIM. His current research interests include high-accuracy method development for food safety and the development of certified reference materials. He has chaired one project for the National Natural Science Foundation of China, as well as participating in three projects of the National Key R&D Program of China. He has published 49 papers with more than 1600 citations (h-index = 22), including 4 on *Food Chem.*, 2 on *Coord. Chem. Rev.* and 1 on *Trends Food Sci. Technol.* He has also chapters in two English books and one Chinese book. He also works as editor for *J. Anal. Test.*, guest editor for Separations and review editor for *Front. Nutrition*. He is invited as reviewer for 27 journals, including for *Food Chem.*, *Food Control*, *J. Hazard. Mater.*, *Environ., Sci. Nano*, and so on.

#### **Rui Weng**

Rui Weng (Dr.) received her Ph.D. degree from Peking University and now works as an associate researcher at the Institute of Quality Standard and Testing Technology for Agro-Products of the Chinese Academy of Agricultural Sciences. Her major research interest is non-targeted screening of pesticides and veterinary drugs, and the quality evaluation of agro-products. She has chaired 12 projects from the National Natural Science Foundation of China, the National Key R&D Program of China, the Beijing Science and Technology Program, etc. She has received five national invention patents and two software copyrights, publishing 32 papers in journals such as *Nano Today*, *Anal. Chem.*, *Food Chem.*, among others. She also works as a reviewer for *Food Chem.*, *Anal. Bioanal. Chem.*, and so on.
