US Patent 9377445 Ionization method, ionization apparatus, and mass analysis system

In order to achieve an ionization method of high robustness with a small carry-over or less crosstalk, an ionization method is disclosed. A method includes the steps of: joining an ionization unit to a tube; sucking the sample from a sample container into a sample holder of the ionization unit to hold the sample; moving the ionization unit holding the sample to near the ionization unit using an ionization unit drive unit; and applying a voltage to the ionization unit using a power supply to ionize the sample by electrostatically spraying the sample from the holding unit.