PYXIS 24 ELISAs are non-isotopic immunoassays possessing high sensitivity and specificity. These assays are used for drug screening with urine, serum, hair, blood, tissue samples and other forensic specimens. Sample preparation is not necessary for analysis of body fluids. The tests are intended to run with serum or oral fluid, but they are matrix independent, and therefore all-purpose applications. The assays can be run on semi- or fully-automated microplate systems.