Gas Chromatography In column switching chromatography compounds trapped on one column are eluted to another column the flow to the column is switched on and off repeatedly one column is removed and replaced by another any of the above compounds trapped on one column are eluted to another column the flow to the column is switched on and off repeatedly one column is removed and replaced by another any of the above ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What useful information can be found from a Van Deemter plot? Optimum mobile phase flow rate The selectivity factor Optimum column length Optimum column temperature Optimum mobile phase flow rate The selectivity factor Optimum column length Optimum column temperature ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography The GC trace obtained after an experiment is called a chromatophore chromatogram graph chromatograph chromatophore chromatogram graph chromatograph ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following is not used for detection in GC? Electrical conductivity Infrared spectroscopy Flame ionisation NMR Electrical conductivity Infrared spectroscopy Flame ionisation NMR ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the selectivity factor describe? None of these The relative separation achieved between two species The maximum number of different species which a column can separate simultaneously The proportional difference in widths of two chromatographic peaks None of these The relative separation achieved between two species The maximum number of different species which a column can separate simultaneously The proportional difference in widths of two chromatographic peaks 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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