Gas Chromatography-Mass Spectrometry (GC/MS) As It Relates To Urine Drug Testing. Gas Chromatography-Mass Spectrometry (or GC/MS) is a two-step methodology used to identify different substances within a test sample. GC/MS is widely used due to its ability to perform a specific test, and is an extremely effective in identifying the presence of a specific substance within a given sample.
(name). (email). To: (email). The Gateway Arch, 630 feet tall and another 630 feet wide, is an elegant frame to the historic city of St. Louis. A gigantic endeavor in its time, the arch is almost 100 feet taller than the Washington Monument and more than twice the height of the Statue of Liberty.
The Gateway Arch, or âGateway to the West,â is the principal component of the Jefferson National Expansion Memorial, an extraordinary monument built on the west bank of the Mississippi River in St. Louis, Missouri, âthe oldest European city in the Midwest.â The Gateway Arch is the tallest man-made monument in the United States (630 feet, or 192 ...