3678696 UPLC-QTOF ultra-performance liquid chromatography quadrupole time-of-flight 11 3678695 UPLC-QTOF ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry 7 3678694 UPLC-QTOF ultra-high-performance liquid chromatography coupled with quadrupole-time-of-flight mass spectrometry system 1 3678697 UPLC-QTOF Ultra-performance liquid chromatography/mass spectrometry 1 3678698 UPLC-QTOF UPLC-quadrupole time of flight mass spectrometry 1