A gas chromatography system having a computer-controlled venting valve system that delivers pressurized pulses to a column junction point of two series-coupled columns having different stationary-phase chemistries and a method of using the same. Each pressurized pulse causes a differential change in...http://www.google.es/patents/US6706535?utm_source=gb-gplus-sharePatente US6706535 - Pulsed carrier gas flow modulation for selectivity enhancements with gas chromatography using series-coupled column ensembles
Pulsed carrier gas flow modulation for selectivity enhancements with gas ...
