Mass spectrometric method and mass spectrometer for analyzing a vaporized sample

Amass spectrometer for analyzing a vaporized sample, comprising:

• a chamber;
• a receiving unit disposed in spatial communication with said chamber to admit therein ionized analytes that are derived from a vaporized sample, and including a mass analyzer for analyzing the ionized analytes;
• an electrospray unit including a nozzle that is disposed in spatial communication with said chamber, that is configured to sequentially form liquid drops of an electrospray medium in said chamber, and that is spaced apart from said receiving unit in a longitudinal direction so as to define a traveling path;
• a voltage supplying member disposed to establish between said nozzle and said receiving unit a potential difference which is of an intensity such that the liquid drops are forced to leave said nozzle as charge-laden ones for heading toward said receiving unit along the traveling path;
• and
• a sample supply unit having an inlet that is disposed in spatial communication with said chamber for introducing the vaporized sample such that, by virtue of concentration gradient for at least one target analyte contained in the vaporized sample, a plurality of diffusing paths are generated in said chamber;
• wherein at least one of said plurality of diffusing paths intersects the traveling path so as to enable said at least one target analyte to be occluded in at least one of said charge-laden liquid drops to thereby form a corresponding one of the ionized analytes.