▎ 摘　　要

NOVELTY - The source has a power supply whose anode electrode is connected with a first electrode i.e. counter electrode, and a cathode electrode is connected with a second electrode. A sample channel is formed at a middle part between the first electrode and the second electrode. The second electrode is fixed with a transparent substrate. A side of the transparent substrate is formed with a graphene layer that is fixed with the first electrode. Another side of the transparent substrate is provided for irradiation of the UV generating device, where the transparent substrate is made of glass. USE - Photo-electric emission ionization source. ADVANTAGE - The source is simple in structure and convenient to use, and has better photoelectric effect. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a photo-electric emission ionization source.