In differential and non-differential analyses, composite images derived from replicates of liquid-chromatography/mass-spectrometry processes can provide scientists with a better signal-to-noise ratio in discovering biological features of interest. Certain distinct peaks in composite images point to distinct biological features but some distinct peaks in composite images may also point to biological features that have common chemical species ancestry. A peak reassembly process is used to indicate whether two adjacent peaks should point to a biological feature using complementation analysis and collision analysis.