RT Journal T1 Determination of Pymetrozine in Tea Products by Solid Phase Extraction-Ultra High Performance Liquid Chromatography-Tandem Mass Spectrometry A1 YU Huan, ZHOU Li, LIN Qin, YANG Jie, SUN Hezhi, WU Xudong, WANG Xinru, ZHANG Xinzhong, CHEN Zongmao, LUO Fengjian PB Journal of Tea Science FD 2019-08-15 YR 2019 JF Journal of Tea Science JO Journal of Tea Science VO 39 IS 4 SP 440 DO 10.13305/j.cnki.jts.2019.04.009 K1 pymetrozine; tea; pesticide residue; solid phase extraction; UPLC-MS/MS LK {https://www.tea-science.com/EN/article/article_650.shtml}