Compact gas flow controllers in gas chromatography

Gas chromatography is a widely used analytical technique facilitating both qualitative and quantitative characterization of a sample. In this method, the sample is injected through a sample injector into a carrier gas stream. Accurate control of the gas stream is achieved using a very accurate mass flow controller (IQ+ FLOW series). Subsequently, the sample undergoes separation in a heated column, where its components elute at different times. Analytes are then detected by a specific type of detector. Each component of the sample will generate a different peak, enabling sample’s constituents’ identification. The attained peaks also permit a quantitative analysis through the calculation of the peak’s areas. 

These analyzers are frequently utilized in chemical plants for real-time monitoring of process parameters, demanding shorter run times. This is challenging, because it is difficult to reach a good balance between faster cycles while keeping acceptable levels of separation. 

MEMS-based gas flow controller 
Analysis becomes much faster if a higher flow rate is used, but by doing so the separation between analytes will be less efficient, therefore increasing flow rates may compromise the analyzer’s sensitivity. 
 
Our IQ+FLOW series are very compact gas flow controllers and an ideal fit for gas chromatography users.