ion source (IonSense, Saugus, USA) combined with an AccuTOF mass spectrometer (JEOL USA Inc., Peabody, USA) was used for DART-MS analysis. The instrument was set to positive-ion mode and the gas heater was set to 300 °C. A m/z mass range of 40 to 800 was used. The DART ion source helium flow rate was 2.0 L/min, the orifice 1 voltage was 20 V, and the orifice 2 voltage was 5 V to minimize fragmentation. Poly(ethylene glycol) (PEG 600) was used to calibrate the mass spectra following sample analysis. TSSPro3 software (Schrader Analytical Laboratories, Detroit, USA) was used for mass spectral analysis.