Gas Chromatography Which of the following detectors give mass flow-dependent signals? Thermal conductivity detector Field ionisation detector All of these Electron capture detector Thermal conductivity detector Field ionisation detector All of these Electron capture detector ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of these effects result from slow injection of a large sample volume? Increased resolution Decreased resolution Non-linear detector response Constant resolution Increased resolution Decreased resolution Non-linear detector response Constant resolution ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the retention factor, k', describe? The migration rate of an analyte through a column All of these The distribution of an analyte between the stationary and the mobile phase The velocity of the mobile phase The migration rate of an analyte through a column All of these The distribution of an analyte between the stationary and the mobile phase The velocity of the mobile phase ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Sample injection is considered successful if the sample is concentrated at the start of the column all of the sample in the injector has been added to the column the sample is spread evenly along the column the sample is homogenously spread along the column the sample is concentrated at the start of the column all of the sample in the injector has been added to the column the sample is spread evenly along the column the sample is homogenously spread along the column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography In column switching chromatography the flow to the column is switched on and off repeatedly one column is removed and replaced by another compounds trapped on one column are eluted to another column any of the above the flow to the column is switched on and off repeatedly one column is removed and replaced by another compounds trapped on one column are eluted to another column any of the above ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Theoretical plates are used to None of these measure the distribution of the analyte between mobile and stationary phases estimate the efficiency of a column determine the thickness of the stationary phase None of these measure the distribution of the analyte between mobile and stationary phases estimate the efficiency of a column determine the thickness of the stationary phase ANSWER DOWNLOAD EXAMIANS APP
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