The RA-Series comprises discrete-direct-purge mercury analyzers, which employ the method of Reducing Vaporization technique for mercury analysis. This technique is also commonly termed as Vapor-Generation or Hydride-Cold-Vapor. In many parts of the analytical world, this technique of Reducing Vaporization – Cold Vapor Atomic Absorption Spectroscopy (CVAAS) is still widely used for mercury measurement. It is also one of the earliest methods that were adopted by EPA and other regulations in their analytical methodology procedure.