Gas Chromatography What does the retention factor, k', describe? 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 The velocity of the mobile phase All of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of these effects result from slow injection of a large sample volume? Decreased resolution Constant resolution Non-linear detector response Increased resolution Decreased resolution Constant resolution Non-linear detector response Increased resolution ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What is the typical internal diameter of fused silica capillary columns? 0.2-0.3 mm 1.0-2.0 mm 0.5-1.0 mm 0.3-0.5mm 0.2-0.3 mm 1.0-2.0 mm 0.5-1.0 mm 0.3-0.5mm ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Theoretical plates are used to estimate the efficiency of a column measure the distribution of the analyte between mobile and stationary phases None of these determine the thickness of the stationary phase estimate the efficiency of a column measure the distribution of the analyte between mobile and stationary phases None of these determine the thickness of the stationary phase ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography In column switching chromatography any of the above compounds trapped on one column are eluted to another column one column is removed and replaced by another the flow to the column is switched on and off repeatedly any of the above compounds trapped on one column are eluted to another column one column is removed and replaced by another the flow to the column is switched on and off repeatedly ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What useful information can be found from a Van Deemter plot? The selectivity factor Optimum mobile phase flow rate Optimum column temperature Optimum column length The selectivity factor Optimum mobile phase flow rate Optimum column temperature Optimum column length ANSWER DOWNLOAD EXAMIANS APP
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