Gas Chromatography Sample injection is considered successful if the sample is homogenously spread along the column the sample is concentrated at the start of 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 homogenously spread along the column the sample is concentrated at the start of the column the sample is spread evenly along the column all of the sample in the injector has been added to the column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Derivatisation of a sample is carried out to reduce polarity of the analytes increase the detector response increase volatility of the analytes All of these reduce polarity of the analytes increase the detector response increase volatility of the analytes 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 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 determine the psychological state of the tutor ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give mass flow-dependent signals? Field ionisation detector Electron capture detector All of these Thermal conductivity detector Field ionisation detector Electron capture detector All of these Thermal conductivity detector ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the selectivity factor describe? The proportional difference in widths of two chromatographic peaks None of these The maximum number of different species which a column can separate simultaneously The relative separation achieved between two species The proportional difference in widths of two chromatographic peaks None of these The maximum number of different species which a column can separate simultaneously The relative separation achieved between two species ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Column bleeding occurs when traces of the stationary phase are eluted the column breaks during installation and causes personal injury the column is cracked and stationary phase leaks out elution of the analyte is extended over time traces of the stationary phase are eluted the column breaks during installation and causes personal injury the column is cracked and stationary phase leaks out elution of the analyte is extended over time ANSWER DOWNLOAD EXAMIANS APP
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