Gas Chromatography Sample retention in the column is measured by retention index retention time retention factor all of these retention index retention time retention factor all of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Theoretical plates are used to None of these determine the thickness of the stationary phase estimate the efficiency of a column measure the distribution of the analyte between mobile and stationary phases None of these determine the thickness of the stationary phase estimate the efficiency of a column measure the distribution of the analyte between mobile and stationary phases ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give concentration-dependent signals? Thermal conductivity Electron-capture detector All of these Infra-red detector Thermal conductivity Electron-capture detector All of these Infra-red detector ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the retention factor, k', describe? The velocity of the mobile phase The distribution of an analyte between the stationary and the mobile phase The migration rate of an analyte through a column All of these The velocity of the mobile phase The distribution of an analyte between the stationary and the mobile phase The migration rate of an analyte through a column All of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Headspace analysis is carried out in order to analyse volatile compounds from solid or liquid samples determine the psychological state of the tutor determine non-volatiles analyse the column contents ahead of the sample analyse volatile compounds from solid or liquid samples determine the psychological state of the tutor determine non-volatiles analyse the column contents ahead of the sample ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What is the typical internal diameter of fused silica capillary columns? 1.0-2.0 mm 0.3-0.5mm 0.5-1.0 mm 0.2-0.3 mm 1.0-2.0 mm 0.3-0.5mm 0.5-1.0 mm 0.2-0.3 mm ANSWER DOWNLOAD EXAMIANS APP
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