Mass Spectrometry (MS) can be found in most industrial laboratories for detailed compositional analysis of process fluids and gases. Though accurate, fast, and complete, laboratory analysis using MS can only provide process information regarding intermediate or final product analysis for quality control programs and production history. MS is currently evolving from a laboratory instrument to an “on line” process analyzer so that a continuous compositional analysis can be utilized for process control purposes. There has been tremendous interest from the Natural Gas market, particularly in NGL production, for utilizing the speed of response and multi-component analysis that Mass Spectrometry can provide