Drugs are used everyday by people in many different ways for many different reasons. Drug testing has become a standard in pre-employment testing, because of the wide variety of drug use in today's society. Drugs tested for by a possible employer include Cocaine (crack), Amphetamines (crystal), Opiates (codeine, morphine, heroin), PCP (phencyclidine), and Marijuana. Gas chromatography/mass spectrometry is used to test hair and urine samples of possible drug abusers or job applicants, and it …showed first 75 words of 767 total…

…showed last 75 words of 767 total…of the prospective employee, and run the sample(s) through a GC/MS to determine if the possible employee has used drugs. They determine this by comparing mass chromatograms of known drugs with that of the test sample. The gas chromatograph/mass spectrometer is known as the best resource to prove the identification of a chemical substance, such as a drug, because of the mass chromatographs that act like a fingerprint of a chemical substance.