Gas Chromatography Which of the following is not used for detection in GC? Electrical conductivity Infrared spectroscopy NMR Flame ionisation Electrical conductivity Infrared spectroscopy NMR Flame ionisation ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Derivatisation of a sample is carried out to increase volatility of the analytes increase the detector response All of these reduce polarity of the analytes increase volatility of the analytes increase the detector response All of these reduce polarity of the analytes ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Split injection is carried out by splitting off some of the sample so that it does not enter the column splitting the sample into smaller portions to inject sequentially None of these splitting the sample into smaller portions to inject at the same time through parallel ports splitting off some of the sample so that it does not enter the column splitting the sample into smaller portions to inject sequentially None of these splitting the sample into smaller portions to inject at the same time through parallel ports ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Column bleeding occurs when 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 the column is cracked and stationary phase leaks out ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What useful information can be found from a Van Deemter plot? The selectivity factor Optimum column temperature Optimum mobile phase flow rate Optimum column length The selectivity factor Optimum column temperature Optimum mobile phase flow rate Optimum column length ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the retention factor, k', describe? All of these The migration rate of an analyte through a column The velocity of the mobile phase The distribution of an analyte between the stationary and the mobile phase All of these The migration rate of an analyte through a column The velocity of the mobile phase The distribution of an analyte between the stationary and the mobile phase ANSWER DOWNLOAD EXAMIANS APP
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