Patent ID: 9673036
Date: 2017-06-06
CPC Classifications: H01J

Claim:
1. A method of decoding multiplet containing spectra in open isochronous ion traps comprising the following steps: (a) calibrating an intensity distribution within multiplets in reference spectra; (b) detecting raw peaks in raw spectra and composing a peak list with data on time-of-flight, intensity, and peak widths of centroids of the raw peaks; (c) constructing a matrix of candidate flight times per single reflection corresponding to time-of-flight values of the raw peaks and to numbers (N) of reflections; (d) selecting likely candidate flight times per single reflection corresponding to multiple hits and gathering groups of corresponding hypothetical multiplets; (e) verifying a validity of peaks of likely candidate flight times within a first group of the groups by analyzing distribution of time-of-flight values and intensities within the hypothetical multiplets; (f) checking for overlapping time-of-flight values between the groups, and discarding overlapping peaks; (g) recovering normalized flight times and intensity using valid peaks of the first group; and (h) accounting for a number of discarded overlapping peaks to recover an expected intensity.