Gas Chromatography Which of the following are not used as stationary phases in a GC column? Polysiloxanes Silica Cyclodextrins None are used as stationary phases Polysiloxanes Silica Cyclodextrins None are used as stationary phases ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography The GC trace obtained after an experiment is called a chromatogram graph chromatophore chromatograph chromatogram graph chromatophore chromatograph ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the retention factor, k', describe? The migration rate of an analyte through a column The distribution of an analyte between the stationary and the mobile phase All of these The velocity of the mobile phase The migration rate of an analyte through a column The distribution of an analyte between the stationary and the mobile phase All of these The velocity of the mobile phase ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Theoretical plates are used to measure the distribution of the analyte between mobile and stationary phases estimate the efficiency of a column None of these determine the thickness of the stationary phase measure the distribution of the analyte between mobile and stationary phases estimate the efficiency of a column None of these determine the thickness of the stationary phase ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What useful information can be found from a Van Deemter plot? Optimum column length Optimum mobile phase flow rate The selectivity factor Optimum column temperature Optimum column length Optimum mobile phase flow rate The selectivity factor Optimum column temperature ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Derivatisation of a sample is carried out to increase the detector response All of these increase volatility of the analytes reduce polarity of the analytes increase the detector response All of these increase volatility of the analytes reduce polarity of the analytes ANSWER DOWNLOAD EXAMIANS APP
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