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The overall process involves four sequential steps.

noise analysis
component perception
spectral "deconvolution"
compound identification

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http://chemdata.nist.gov/mass-spc/amdis/overview/page6.htm
       
Once the components are indicated and the spectra are purified, AMDIS runs a search algorithm to match (Identify) each spectrum to a library spectrum.

Unlike a traditional identification algorithms, AMDIS includes uncertainties in the deconvolution, purity, and retention times in the match factor.   The final match factor is a measure of both the quality of the match and of the confidence in the identification.

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