Gas Chromatography Which of the following gases is unsuitable for use as a GC carrier gas? Helium All of these Nitrogen Oxygen Helium All of these Nitrogen Oxygen ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Sample injection is considered successful if 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 homogenously spread along the column the sample is spread evenly 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 homogenously spread along the column the sample is spread evenly along the column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give concentration-dependent signals? Thermal conductivity Electron-capture detector Infra-red detector All of these Thermal conductivity Electron-capture detector Infra-red detector All of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the selectivity factor describe? None of these The relative separation achieved between two species The maximum number of different species which a column can separate simultaneously The proportional difference in widths of two chromatographic peaks None of these The relative separation achieved between two species 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 What are the benefits of decreasing the column internal diameter? Increased sample capacity All of these Increased resolution Reduced risk of column overloading Increased sample capacity All of these Increased resolution Reduced risk of column overloading ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Headspace analysis is carried out in order to determine the psychological state of the tutor analyse the column contents ahead of the sample determine non-volatiles analyse volatile compounds from solid or liquid samples determine the psychological state of the tutor analyse the column contents ahead of the sample determine non-volatiles analyse volatile compounds from solid or liquid samples ANSWER DOWNLOAD EXAMIANS APP
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