The Blood Alcohol Unit receives specimens mainly from Driving Under the Influence (DUI) cases to determine the quantity of ethanol (common names include: alcohol, drinking alcohol, ethyl alcohol) present in an individual’s blood. The methodology utilized for this type of test is known as Headspace Gas Chromatography Analysis. If the blood alcohol result is < 0.084 g/dL the specimen is subjected to drug screening.
The Drug Screen Unit screens for six classes of drugs by immunoassay. The lab uses two types of immunoassays, Enzyme-Multiplied Immunoassay Techniques (EMIT) and Enzyme-Linked Immunosorbent Assay (ELISA).
Specimens that screen positive proceed to the Drug Confirmation Unit where drugs are identified and quantitated using a Gas Chromatograph/Mass Spectrometer (GC/MS).