| CPC H01J 49/0036 (2013.01) [G06F 17/16 (2013.01); G06F 17/17 (2013.01); H01J 49/0045 (2013.01)] | 20 Claims |

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1. A method for identifying a precursor ion of a product ion in a mass spectrometry experiment, comprising:
obtaining an encoding of a unique product ion including a series of entries; and
identifying the precursor ion as based on an apex of the series of entries.
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