| 摘要 |
PURPOSE:To obtain a multiple ion source able to perform a CI method and an FAB method by preparing an ionization chamber able to selectively supply a reation gas for CI and the gas for FAB as well as an ionization chamber able to selectively introduce samples. CONSTITUTION:An ionization chamber 12, whereinto a sample is to be introduced through a path 10 furnished with drawer type electrodes 13 and 14, is connected to the ionization chamber 1 selectively supplying a reaction gas for chemical ionization and the gas for high speed neutral particle bombardment ionization through valves 6 and 7. And in the case of a CI method, an ionization box 15 for CI having a repeller electrode 17 is inserted into the ionization chamber 12, while in the case of the FAB method, a target 33 for FAB is introduced into the ionization chamber 12 to ionize the sample and accelerate it by the acceleration electrodes 19 and 20 so as to guide it into a mass spectrosystem. Accordingly, one ionization source can easily perform both the CI method and the FAB method thus to improve easiness of handling. |
