flight mass spectrometers 75] with the ability to provide 500 spectra per second In addition, TOF mass spectrometers with narrow-bore are necessary. columns offer the excellent detection limits 76] that are required for the very small samples that must be injected on columns suitable for ultrafast GC. At the present time, there is only one commercial provider of such a GCMS -Leco Corporation (St Josephs, MI, USA http://www.LEco.com)