Collection Blank
Definition
A control addressing relevant collection-device or handling background. Their selection should match the contamination pathways and stages being assessed. A clean control does not rule out every earlier contamination event.
- Context
- Contamination controls
For example, an unused collection device processed appropriately can help investigate device or handling background without recreating every possible scene contamination route.
A positive control finding needs investigation rather than an automatic conclusion about every exhibit.
Related terms
- Chemiluminescence
- Chemiluminescence is light emission generated by a chemical reaction rather than by an external excitation light source. Forensic applications include screening reactions...
- Continuity Record
- Documentation connecting an exhibit’s identity, possession, handling and storage. Document material subdivisions and derivatives as part of that history. Continuity and analytical...
- Substrate Comparison
- A sample used to investigate relevant background on an item, distinct from process blanks. Material from an appropriate part of an item...
- Whole-Item Recovery
- Collection of an item for controlled later sampling instead of immediate partial recovery. Prioritisation chooses examinations according to relevant questions, material and...