Gas Chromatography What is the typical internal diameter of fused silica capillary columns? 1.0-2.0 mm 0.3-0.5mm 0.5-1.0 mm 0.2-0.3 mm 1.0-2.0 mm 0.3-0.5mm 0.5-1.0 mm 0.2-0.3 mm ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following gases is unsuitable for use as a GC carrier gas? Oxygen Helium Nitrogen All of these Oxygen Helium Nitrogen All of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the selectivity factor describe? 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 None of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the retention factor, k', describe? 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 The velocity of the mobile phase 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 Headspace analysis is carried out in order to analyse the column contents ahead of the sample determine the psychological state of the tutor analyse volatile compounds from solid or liquid samples determine non-volatiles analyse the column contents ahead of the sample determine the psychological state of the tutor analyse volatile compounds from solid or liquid samples determine non-volatiles ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS