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Background subtraction

The analytical practice of comparing fire debris EIPs against comparison sample EIPs from unburned substrate of the same type. Features present in both are attributed to substrate background; features present only in the debris are candidate accelerant signals.

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Related terms

4-Vinylcyclohexene (4-VCH)Alkene triplet patternComparison (control) samplePrincipal component analysis (PCA)PyrolysisSubstrate interferentSWGFEX Type C interferent listType C interferent (E1618)Unresolved complex mixture (UCM)

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