A 'Mixture match' result indicates which situation?

• A. Single positive match cannot be found
• B. Multiple matches found
• C. All matches are identical
• D. No match found

Answer: (A)

A mixture match signals that the sample is composed of elements from more than one source, so you can’t point to a single reference as the definitive match. In pattern-matching terms, no unique, single positive match can be established because the combination of components prevents a one-to-one identification. The system acknowledges that the mixture blends features from multiple sources, which means you can’t confidently claim a single source as the match.

If you tried to force the result to a single reference, you’d misrepresent the data, because the mixture inherently contains more than one contributing component. A scenario where multiple distinct matches are found would imply several clean, individual sources each fully explaining the sample, which isn’t consistent with a true mixture. Likewise, no match at all would suggest the sample doesn’t resemble any reference, which contradicts the presence of identifiable mixture components.