| 摘要 |
PURPOSE:To adjust incident conditions of ions into a main electrode by forming the captioned quadrupole mass spectrometer while providing an auxiliary quadrupole electrode fixed on the same axis as that of a main quadrupole electrode at a prescribed angle of rotation with respect to said main electrode. CONSTITUTION:A quadrupole mass spectrometer is constructed by arranging an ion source on the side A of a main quadrupole electrode 2 and a detector on the side B, while an auxiliary quadrupole electrode 4 is disposed between the ion source and the main electrode 2 adjoining to the main electrode 2 on the same axis as that thereof so as not to make contact therewith. Prescribed voltage is applied to both the electrodes 2,4 to permitions to enter there between for measurement, while the auxiliary electrode 4 is rotated by an angle theta and then fixed for analysis at a position of improved sensitivity and resolution of the spectrometer to the utmost. Thus, incident conditions of the ions onto the main electrode 2 can be adjusted, and furthermore even with an analyzer having accuracy of processing and assembly achievable with ease, disturbance of an electric field can be corrected to assure sufficient high sensitivity. |
