Gas Chromatography Which of the following are not used as stationary phases in a GC column? Polysiloxanes Silica None are used as stationary phases Cyclodextrins Polysiloxanes Silica None are used as stationary phases Cyclodextrins ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Column bleeding occurs when the column is cracked and stationary phase leaks out elution of the analyte is extended over time the column breaks during installation and causes personal injury traces of the stationary phase are eluted the column is cracked and stationary phase leaks out elution of the analyte is extended over time the column breaks during installation and causes personal injury traces of the stationary phase are eluted ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Sample retention in the column is measured by retention factor retention index all of these retention time retention factor retention index all of these retention time ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What are the benefits of decreasing the column internal diameter? Increased resolution All of these Increased sample capacity Reduced risk of column overloading Increased resolution All of these Increased sample capacity Reduced risk of column overloading ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give concentration-dependent signals? All of these Thermal conductivity Infra-red detector Electron-capture detector All of these Thermal conductivity Infra-red detector Electron-capture detector ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the selectivity factor describe? The relative separation achieved between two species The proportional difference in widths of two chromatographic peaks None of these The maximum number of different species which a column can separate simultaneously The relative separation achieved between two species The proportional difference in widths of two chromatographic peaks None of these The maximum number of different species which a column can separate simultaneously ANSWER DOWNLOAD EXAMIANS APP
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