Optimizing flow-rates in capillary gas-chromatography mass-spectrometry

The effects of the type of gas chromatograph-mass spectrometer interface and the type of flow regulation on flow-rate requirements for optimum efficiency for both isothermal and temperature programmed analyses on capillary columns are examined. Equations and figures are presented which enable rapid selection of optimum parameters such as inlet pressure, average velocity and flow-rate for various situations.