Patent ID: 6580071
Filing Date: 2003-06-17
Classification: H01J

Abstract:
A method for calibrating a time-of-flight mass spectrometer, the method comprising:a) determining time-of-flight values, or values derived from the time-of-flight values for a calibration substance at each of a plurality of different addressable locations on a sample substrate; b) identifying one of the addressable locations on the substrate as a reference addressable location; and c) calculating a plurality correction factors for the respective addressable locations on the substrate using the time-of-flight value, or a value derived from the time-of-flight value, for the calibration substance on the reference addressable location, wherein each correction factor corrects the time-of-flight value, or the value derived from the time-of-flight value, for the calibration substance on an addressable location within the plurality of addressable locations with respect to the reference addressable location.