Boric Acid Functionalized Hypercrosslinked Polymers for Selective Extraction of Trace Catecholamines and Their Metabolites in Rat Serum. - Zhang, Zhiyu; Yang, Cheng; Zhao, Di; Zhao, Yuanqing; Li, Lixin; Li, Zhonghua; Zhang, Zhenqiang; Hu, Kai (Journal of Separation Science, 2024)