1. National Reference Laboratory of Veterinary Drug Residues, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
2. Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
3. Guangdong Huanong Hi-Tech Bio-Pharmaceutical Co. Limited, Guangzhou 510642, China
4. School of Chemistry, South China Normal University, Guangzhou 510006, China