| 摘要 |
PURPOSE:To have sure identification of specimen by quickly scanning the mass range to be measured while the specimen is ionized and sensed, changing up and down the electric field applied to the intermediate pressure part one scanning after another, and by increasing the strength of molecular ions or, by contrast, increasing the strength fragment ions. CONSTITUTION:Mixture specimen contained in a liquid carrier is separated with a liquid chromatograph 1, and the flowout liquid containing it is poured into an atomizer 3 via a Teflon tube 2 to turn it into liquid drops, and a gasifier 4 turns it into free specimen molecules without solvation. This undergoes a corona discharge treatment using a needle electrode 5 under a vacuum of 1-760Torr, and molecular ions as a product are put in an intermediate pressure part having No.1 electrodes 6 and 7 with small hole, wherein the inside pressure is 0.1-10Torr. The control voltage from power supply 14 is impressed on the electrodes 6 and 7 and generated different mass sensed by an ion sensor 18. Thus the intensities of molecular ions and fragment ions are enlarged by simulation to ensure the identification with mass spectrum.
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