Patent ID: 7638763
Filing Date: 2009-12-29
Classification: H01J,Y10T

Abstract:
1. A method comprising: selecting a length for a time interval as a function of a plurality of m/z values of ions that will be accumulated in an ion trap; accumulating the ions having the plurality of m/z values in the ion trap during the time interval; deriving from the accumulated ions a respective intensity value for each of the m/z values; and adjusting each of the intensity values as a function of the time needed by the ion trap to begin collecting ions with the corresponding m/z value, wherein the selecting includes selecting the length of the time interval to be the sum of a selected injection time plus an offset time, the offset time being at least as long as the time needed by the ion trap to begin collecting ions with the largest m/z value targeted to be collectible during the time interval.