Questioned (Q) Sample
Definition
A sample recovered from a scene, a person, or an object whose origin or relationship to a source is the subject of the forensic inquiry. The Q sample is what is being tested.
Related terms
- Certified Reference Material (CRM)
- A sample with one or more analyte concentrations established by an accredited body and traceable to a national metrology institute. NIST SRM...
- Known (K) Sample
- A sample with documented, verified provenance used as the reference in a comparison. The origin of a K sample is not in...
- Measurement Traceability
- The property of a measurement result whereby it can be related to a national or international measurement standard through an unbroken chain...
- Negative Control (Blank)
- A sample known to contain no target analyte, processed alongside casework samples. Confirms that background contamination is not producing false signals in...
- Positive Control
- A sample of known composition containing the target antigen at a concentration that should produce a defined signal. Run alongside case samples...
Explained in
- Reference Standards, Controls and Comparison LogicA sample recovered from a scene, a person, or an object whose origin or relationship to a source is the subject of the forensic inquiry. The Q sample is what i...