Used to test the validity of the measurement process, where the composition of the sample is unknown except to the person submitting it.

Used for initial setting of calibration of the instrument.

Used with manufactured reference providing signals that simulate QC results

Specimen used for testing proficiency of the organization performing the testing (Filler).

Used when solid specimens consist of multiple individual elements that are not individually identified but can be separated again into the original specimens. The identifiers of the original specimens may be tracked.

This identifies a parent specimen to the specimen that is submitted for testing

Used when aliquots of liquid individual specimens are combined to form a single specimen representing all of the components that are not individually identified. The identifiers of the original specimens may be tracked.

Specimen used for testing Operator Proficiency.

Used for any patient sample.

Used when specimen is the control specimen (either positive or negative).

Used when a patient sample is re-run as a control for a repeat test.

Used for periodic calibration checks.