A novel mass spectrometry technique was applied in our works, named ambient ionization mass spectrometry.
This paper reported on two means of ambient ionization mass spectrometry: leaf spray and paper spray.
A leaf spray MS method to rapidly distinguish five species of Callicarpa L. without any sample preparation.
A semi-quantitative method for phenylpropanoid glycosides in Callicarpa L. Folium extracts by mean of paper spray MS.
The prominent merits of direct spray MS are simple, rapid(less than one minute) and low cost.