The gas chromatography-mass spectrometry (GC-MS) screen offers the possibility of detecting potential toxicants in a sample. Data is matched to a library of mass spectra that includes more than 200,000 compounds. The GC-MS screen is capable of detecting pesticides (organophosphorus, carbamate, pyrethroid, and chlorinated), industrial pollutants, natural products, alkaloids, vitamins, and drugs. If the specimen of interest is not listed or if you have questions regarding suspected compounds please contact the lab for further information. This test will not detect mycotoxins, heavy metals, anticoagulants, or ionophores.