Gas Chromatography A retention gap is placed between the injector and the front of the column to retain contaminants and prevent them from reaching the column prevent backflush of the injected solution retain the sample and release it gradually to the column All of these retain contaminants and prevent them from reaching the column prevent backflush of the injected solution retain the sample and release it gradually to the column All of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give mass flow-dependent signals? Field ionisation detector Electron capture detector Thermal conductivity detector All of these Field ionisation detector Electron capture detector Thermal conductivity detector All of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Headspace analysis is carried out in order to analyse the column contents ahead of the sample determine the psychological state of the tutor determine non-volatiles analyse volatile compounds from solid or liquid samples analyse the column contents ahead of the sample determine the psychological state of the tutor determine non-volatiles analyse volatile compounds from solid or liquid samples 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 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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