Mass spectrometric imaging method under ambient conditions using electrospray-assisted laser desorption ionization mass spectrometry

摘要

A mass spectrometric imaging method includes the steps of: forcing sequentially generated charge-laden liquid drops to move towards a receiving unit of a mass spectrometer along a traveling path; scanning a sample with a laser beam which has an irradiation energy sufficient to cause analytes contained in the sample to be desorbed to fly along a plurality of flying paths respectively; and positioning the sample relative to the laser beam to render the plurality of flying paths intersecting the traveling path so as to permit a plurality of the analytes respectively along the plurality of flying paths to be occluded in a plurality of the charge-laden liquid drops respectively to thereby form a plurality of corresponding ionized analytes.