Patent ID: 9548193
Date: 2017-01-17
CPC Classifications: H01J

Claim:
1. A method for executing a quadrupole mass spectrometer which includes a quadrupole mass filter for selectively allowing an ion having a specific mass to pass through and a detector for detecting the ion which has passed through the quadrupole mass filter and which performs a scan measurement in which a cycle of scanning a mass of ions which pass through the quadrupole mass filter across a predetermined mass range is repeated, the method comprising: applying a predetermined voltage by a quadrupole driver to each of electrodes composing the quadrupole mass filter; and in performing the scan measurement by a controller, setting a scan margin at least either above or below a specified mass range by a scan margin width, which is a difference between a scan initiation mass and a mass with which the scan measurement is actually initiated or a difference between a mass with which the scan measurement is actually terminated and a scan termination mass, and controlling the quadrupole driver in such a manner as to change the voltage applied to each of the electrodes composing the quadrupole mass filter so as to scan a mass range which is wider than the specified mass range by the scan margin, and wherein the scan margin width is changed in accordance with a scan rate (mass per unit time).