| 摘要 |
The present invention relates to a quadrupole mass filter for a quadrupole mass spectrometer, the quadrupole mass filter comprising four electrodes and an insulator holder for fixing the four electrodes. In the quadrupole mass filter according to the present invention, a portion of the inner surface of the insulator holder, which comes in contact with each electrode, is formed as a flat surface, and a portion of each of the four electrodes, which comes in contact with the insulator holder, is formed as a flat surface. Therefore, the present invention can provide a quadrupole mass spectrometer that is excellent in the parallelism, straightness, and assembly accuracy of a quadrupole. |
