| 摘要 |
There is disclosed an ion source for use in a mass spectrometer. The front end of an inlet tube carrying liquid sample reaches into the ionization chamber of the ion source, and is obstructed by a porous member. Sample injected into the porous member from the inlet tube passes through the porous member and exudes from its surface. Then, the sample evaporates into the ionization chamber. The vaporized sample is ionized by electron-impact ionization or chemical ionization.
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