Gas Chromatography A retention gap is placed between the injector and the front of the column to prevent backflush of the injected solution retain contaminants and prevent them from reaching the column retain the sample and release it gradually to the column All of these prevent backflush of the injected solution retain contaminants and prevent them from reaching the column retain the sample and release it gradually to the column All of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography In column switching chromatography any of the above one column is removed and replaced by another the flow to the column is switched on and off repeatedly compounds trapped on one column are eluted to another column any of the above one column is removed and replaced by another the flow to the column is switched on and off repeatedly compounds trapped on one column are eluted to another column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What is the typical internal diameter of fused silica capillary columns? 0.5-1.0 mm 0.2-0.3 mm 0.3-0.5mm 1.0-2.0 mm 0.5-1.0 mm 0.2-0.3 mm 0.3-0.5mm 1.0-2.0 mm ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Sample retention in the column is measured by retention factor retention time retention index all of these retention factor retention time retention index all of these 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
Gas Chromatography Doubling the column's length increases resolution by a factor of 2 (2)0.5 4 3 2 (2)0.5 4 3 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS