Gas Chromatography Sample injection is considered successful if the sample is concentrated at the start of the column the sample is spread evenly along the column the sample is homogenously spread along the column all of the sample in the injector has been added to the column the sample is concentrated at the start of the column the sample is spread evenly along the column the sample is homogenously spread along the column all of the sample in the injector has been added to the column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Derivatisation of a sample is carried out to 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 increase the detector response All of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What are the benefits of decreasing the column internal diameter? Reduced risk of column overloading Increased sample capacity All of these Increased resolution Reduced risk of column overloading Increased sample capacity All of these Increased resolution ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the selectivity factor describe? 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 The maximum number of different species which a column can separate simultaneously The proportional difference in widths of two chromatographic peaks ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following are not used as stationary phases in a GC column? Cyclodextrins Silica None are used as stationary phases Polysiloxanes Cyclodextrins Silica None are used as stationary phases Polysiloxanes ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Sample retention in the column is measured by all of these retention factor retention time retention index all of these retention factor retention time retention index ANSWER DOWNLOAD EXAMIANS APP
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