DECOY LIBRARY CONSTRUCTION METHOD AND APPARATUS, TARGET-DECOY LIBRARY CONSTRUCTION METHOD AND APPARATUS, AND METABOLOME FDR IDENTIFICATION METHOD AND APPARATUS

Disclosed are a decoy library construction method and apparatus, a target-decoy library construction method and apparatus and a metabolome FDR identification method and apparatus. The decoy library construction method comprises: S1, respectively comparing a mass-to-charge ratio M of a parent ion of a metabolite of each spectrogram in a target database with those of all other spectrograms in the target database one by one, storing a spectrogram, a mass-to-charge ratio of a daughter ion of which is equal to M, and/or the serial number of the spectrogram in a signal spectrum index array, and generating a signal spectrum index two-dimensional array; S2, traversing all elements in the signal spectrum index two-dimensional array to obtain n arrays D, wherein the n arrays D constitute a decoy library signal array; and S3, copying parent ion information of the spectrogram, corresponding to each sub-set in the decoy library signal array, in the target database to the decoy library signal array to form a decoy library.