Gas Chromatography Column bleeding occurs when the column is cracked and stationary phase leaks out elution of the analyte is extended over time traces of the stationary phase are eluted the column breaks during installation and causes personal injury the column is cracked and stationary phase leaks out elution of the analyte is extended over time traces of the stationary phase are eluted the column breaks during installation and causes personal injury ANSWER DOWNLOAD EXAMIANS APP
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 any of the above one column is removed and replaced by another compounds trapped on one column are eluted to another column the flow to the column is switched on and off repeatedly any of the above one column is removed and replaced by another ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following are not used as stationary phases in a GC column? None are used as stationary phases Silica Cyclodextrins Polysiloxanes None are used as stationary phases Silica Cyclodextrins Polysiloxanes ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the selectivity factor describe? The proportional difference in widths of two chromatographic peaks The maximum number of different species which a column can separate simultaneously None of these The relative separation achieved between two species The proportional difference in widths of two chromatographic peaks The maximum number of different species which a column can separate simultaneously None of these The relative separation achieved between two species ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Doubling the column's length increases resolution by a factor of 2 4 (2)0.5 3 2 4 (2)0.5 3 ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the retention factor, k', describe? All of these The migration rate of an analyte through a column The distribution of an analyte between the stationary and the mobile phase The velocity of the mobile phase All of these The migration rate of an analyte through a column The distribution of an analyte between the stationary and the mobile phase The velocity of the mobile phase ANSWER DOWNLOAD EXAMIANS APP
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