Gas Chromatography What does the selectivity factor describe? The relative separation achieved between two species None of these The proportional difference in widths of two chromatographic peaks The maximum number of different species which a column can separate simultaneously The relative separation achieved between two species None of these The proportional difference in widths of two chromatographic peaks The maximum number of different species which a column can separate simultaneously ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What useful information can be found from a Van Deemter plot? Optimum mobile phase flow rate Optimum column length The selectivity factor Optimum column temperature Optimum mobile phase flow rate Optimum column length The selectivity factor Optimum column temperature 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 Which of the following detectors give mass flow-dependent signals? Thermal conductivity detector All of these Electron capture detector Field ionisation detector Thermal conductivity detector All of these Electron capture detector Field ionisation detector ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Split injection is carried out by None of these splitting off some of the sample so that it does not enter the column splitting the sample into smaller portions to inject at the same time through parallel ports splitting the sample into smaller portions to inject sequentially None of these splitting off some of the sample so that it does not enter the column splitting the sample into smaller portions to inject at the same time through parallel ports splitting the sample into smaller portions to inject sequentially ANSWER DOWNLOAD EXAMIANS APP
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
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