LC-MS Peak Annotation and Identification with CAMERA

The R-package CAMERA is a Collection of Algorithms for MEtabolite pRofile Annotation. Its primary purpose is the annotation and evaluation of LC-MS data. It includes algorithms for annotation of isotope peaks, adducts and fragments in peak lists. Additional methods cluster mass signals that originate from a single metabolite, based on rules for mass differences and peak shape comparison [1]. To use the strength of already existing programs, CAMERA is designed to interact directly with processed peak data from the R-package xcms [2]. Based on this annotation results, the molecular composition can be calculated if the mass spectrometer has a high-enough accuracy for both the mass and the isotope pattern intensities in combination with the R-package Rdisop