Preparation of phenyl–boronic acid polymeric monolith by initiator-free ring-opening polymerization for microextraction of sulfonamides prior to their determination by ultra-performance liquid chromatography–tandem mass spectrometry. - Duan, Rui; Sun, Lu; Yang, Hui-Yuan; Ma, Yi-Rong; Deng, Xi-Yan; Peng, Chao; Zheng, Chao; Dong, Lin-Yi; Wang, Xian-Hua (Journal of Chromatography A, 2020)