HCT PTM Discovery System electrospray ionization ion trap mass spectrometer
using the following parameters: negative ion mode; scan,
100–1000 m/z; nebulizer, 60.00 psi; dry gas, 11 L/min; 365 C;
capillary, ±3500 V. The mother ions and fragmentation ions were
used to the identification of flavonol glycosides.