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 Animation on how a known contributor sample is used to infer the profile of an unknown contributor

September 9, 2020
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0:01 Sometimes a major and minor contributor will not be easily discernable in a mixture sample.

0:06 However, if one of the contributors can be identified, a known single-source sample

0:11 can be obtained. The profile from that contributor can be analyzed separately to

0:15 determine its peak locations and height ratios. This essentially allows the analyst to subtract

0:21 the known profile from the mixture profile if the mixture represented two contributors,

0:26 then the remaining peaks will give a likely idea of the unknown profile.
    
  
Disclaimer:
              Opinions or points of view expressed in these recordings represent those of the speakers and do not necessarily represent the official position or policies of the U.S. Department of Justice. Any commercial products and manufacturers discussed in these recordings are presented for informational purposes only and do not constitute product approval or endorsement by the U.S. Department of Justice.
  
Date Published: September 9, 2020
    
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