Gas Chromatography What does the selectivity factor describe? The maximum number of different species which a column can separate simultaneously The proportional difference in widths of two chromatographic peaks The relative separation achieved between two species None of these The maximum number of different species which a column can separate simultaneously The proportional difference in widths of two chromatographic peaks The relative separation achieved between two species None of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Split injection is carried out by splitting the sample into smaller portions to inject at the same time through parallel ports splitting the sample into smaller portions to inject sequentially None of these splitting off some of the sample so that it does not enter the column splitting the sample into smaller portions to inject at the same time through parallel ports splitting the sample into smaller portions to inject sequentially None of these splitting off some of the sample so that it does not enter the column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following gases is unsuitable for use as a GC carrier gas? Helium All of these Oxygen Nitrogen Helium All of these Oxygen Nitrogen ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Headspace analysis is carried out in order to analyse the column contents ahead of the sample analyse volatile compounds from solid or liquid samples determine non-volatiles determine the psychological state of the tutor analyse the column contents ahead of the sample analyse volatile compounds from solid or liquid samples determine non-volatiles determine the psychological state of the tutor ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Sample retention in the column is measured by retention time all of these retention factor retention index retention time all of these retention factor retention index ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What useful information can be found from a Van Deemter plot? The selectivity factor Optimum column length Optimum column temperature Optimum mobile phase flow rate The selectivity factor Optimum column length Optimum column temperature Optimum mobile phase flow rate ANSWER DOWNLOAD EXAMIANS APP
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