Every specter is unique and is easily recognizable. Using this method, specters of the following gases were gathered :Acetone (propanone), Ammonia, Argon, Butylamine, Carbon dioxide, Carbon tetrachloride, Nitrogen, Oxygen, Ethanol (ethyl alcohol), Helium, Hydrogen peroxide, Isobutane (methylpropane), Isopropanol (isopropyl alcohol), Mercury, Methane, Methanol (methyl alcohol), Nitric Oxide, Radon, Toluene, Xenon.