ParticipantID: oberacher Category: category2 Authors: Oberacher, Herbert Affiliations: Institute of Legal Medicine and Core Facility Metabolomics, Innsbruck Medical University Automatic pipeline: yes Spectral libraries: yes Abstract We processed only the LC-MS challenges. The challenge data was used as input for automated library search in 4 libraries. (a) MassBank (Date: 7.1.2013, Spectrum Search, Tolerance m/z: 0.3 units, Cutoff Threshold: 5, MS Type: All, Positive and Negative) (b) Metlin (Date: 9.1.2013, MSMS Spectrum Search, Tolerance MSMS 0.01-0.1 Da, Tolerance precursor: 100 ppm, Positive and Negative) (c) NIST (NIST 2012 - May 2012, NIST MS Search Program 2.0g - MSMS Search - Identity Search, m/z tolerance: 1.6 for precursor ions and 0.8 for product ions, Positive and Negative) (d) Wiley Registry of Tandem Mass Spectral Data, MSforID (Ed. 1, MSforID Search, m/z tolerance: 0.01-0.1, Intensity threshold: 0.05, Positive and Negative)