What is an Immunoassay and How is it Different from Gas Chromatography – Mass Spectrometry (GC/MS)?
Immunoassay tests for Methamphetamine have been around for a long time. They are used primarily to screen urine for the presence of narcotics such as Methamphetamine. The test kit works on the principle of a substances reaction of antibody to antigen. The assay allows specific binding of the antibody to its antigen. This allows for a pass/fail type of result.GC/MS is a laboratory method that combines the features of gas-liquid chromatography and mass spectrometry to identify different substances within a test sample. It can identify trace elements in materials that were previously thought to have disintegrated beyond identification.The GC-MS has been widely heralded as a “gold standard” for forensic substance identification because it is used to perform a specific test. A specific test positively identifies the actual presence of a particular substance in a given sample. The difference between these two methods is the type of information (data) obtained. The immunoassay is categorized
