Table 1.

The parameter of mass spectrometer.

Parameter name	Parameter	Parameter value
Ion mode	Polarity	Parameter value
Parent ion scanning range	MS scan range	350–2,000 m/z
Secondary resolution	Resolution	17,500
Capillary temperature	Capillary temperature	320°C
Source voltage	Ion source voltage	1,800 V
Fragmentation mode	MS/MS acquisition modes	Higher collision energy dissociation (HCD)
Collision energy normalization	Normalized collision energy (NCE)	28