Aliquot- a portion of a specimen used for testing.
Confirmatory Test- a second analytical procedure used to identify the presence of a specific drug or metabolite in a specimen. The confirmatory test must be different in technique and chemical principle from that of the initial test procedure to ensure reliability and accuracy. [At this time gas chromatography/mass spectrometry (GC/MS) is the only authorized confirmation method. Gas chromatography is authorized for confirmation of alcohol (ethanol) concentrations in specimens.]
Initial Test- a sensitive, rapid, and inexpensive immunoassay screen to eliminate true negative specimens from further consideration.
Intralaboratory Chain of Custody- procedures used by the laboratory to maintain control and accountability from the receipt of specimens until testing is completed, results reported, and while specimens are in storage.
La. Admin. Code tit. 40, § I-1503