Gas Chromatography Which of the following detectors give concentration-dependent signals? Infra-red detector All of these Electron-capture detector Thermal conductivity Infra-red detector All of these Electron-capture detector Thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following are not used as stationary phases in a GC column? Cyclodextrins Polysiloxanes None are used as stationary phases Silica Cyclodextrins Polysiloxanes None are used as stationary phases Silica 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 Derivatisation of a sample is carried out to increase the detector response reduce polarity of the analytes All of these increase volatility of the analytes increase the detector response reduce polarity of the analytes All of these increase volatility of the analytes ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Headspace analysis is carried out in order to analyse volatile compounds from solid or liquid samples analyse the column contents ahead of the sample determine non-volatiles determine the psychological state of the tutor analyse volatile compounds from solid or liquid samples analyse the column contents ahead of the sample determine non-volatiles determine the psychological state of the tutor ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What useful information can be found from a Van Deemter plot? Optimum column length Optimum column temperature Optimum mobile phase flow rate The selectivity factor Optimum column length Optimum column temperature Optimum mobile phase flow rate The selectivity factor ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS