Gas Chromatography Theoretical plates are used to 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 None of these determine the thickness of the stationary phase estimate the efficiency of a column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What is the typical internal diameter of fused silica capillary columns? 1.0-2.0 mm 0.5-1.0 mm 0.3-0.5mm 0.2-0.3 mm 1.0-2.0 mm 0.5-1.0 mm 0.3-0.5mm 0.2-0.3 mm ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Derivatisation of a sample is carried out to reduce polarity of the analytes All of these increase the detector response increase volatility of the analytes reduce polarity of the analytes All of these increase the detector response increase volatility of the analytes ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What useful information can be found from a Van Deemter plot? Optimum mobile phase flow rate Optimum column temperature Optimum column length The selectivity factor Optimum mobile phase flow rate Optimum column temperature Optimum column length The selectivity factor 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 Split injection is carried out by splitting off some of the sample so that it does not enter the column None of these splitting the sample into smaller portions to inject at the same time through parallel ports splitting the sample into smaller portions to inject sequentially splitting off some of the sample so that it does not enter the column None of these splitting the sample into smaller portions to inject at the same time through parallel ports splitting the sample into smaller portions to inject sequentially ANSWER DOWNLOAD EXAMIANS APP
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