Gas Chromatography What does the retention factor, k', describe? The velocity of the mobile phase All of these The distribution of an analyte between the stationary and the mobile phase The migration rate of an analyte through a column The velocity of the mobile phase All of these The distribution of an analyte between the stationary and the mobile phase The migration rate of an analyte through a column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give concentration-dependent signals? Infra-red detector Electron-capture detector Thermal conductivity All of these Infra-red detector Electron-capture detector Thermal conductivity All of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following gases is unsuitable for use as a GC carrier gas? Oxygen All of these Nitrogen Helium Oxygen All of these Nitrogen Helium ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following is not used for detection in GC? NMR Infrared spectroscopy Electrical conductivity Flame ionisation NMR Infrared spectroscopy Electrical conductivity Flame ionisation ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Doubling the column's length increases resolution by a factor of 4 3 (2)0.5 2 4 3 (2)0.5 2 ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the selectivity factor describe? The relative separation achieved between two species The proportional difference in widths of two chromatographic peaks None of these The maximum number of different species which a column can separate simultaneously The relative separation achieved between two species The proportional difference in widths of two chromatographic peaks None of these The maximum number of different species which a column can separate simultaneously ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS