1. A method for identifying a convolved peak, comprising: obtaining a plurality of spectra, wherein each spectrum of the plurality of spectra represents measurements from one or more samples; using a multivariate analysis technique that identifies two or more sets of correlated data points from the plurality of spectra and assigns each set of correlated data points to a group producing a plurality of groups; selecting a peak from the plurality of spectra; and if the peak comprises data points assigned to two or more groups of the plurality of groups, identifying the peak as a convolved peak.