Gas Chromatography What is the typical internal diameter of fused silica capillary columns? 1.0-2.0 mm 0.2-0.3 mm 0.3-0.5mm 0.5-1.0 mm 1.0-2.0 mm 0.2-0.3 mm 0.3-0.5mm 0.5-1.0 mm ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give concentration-dependent signals? Infra-red detector Thermal conductivity Electron-capture detector All of these Infra-red detector Thermal conductivity Electron-capture detector All of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following gases is unsuitable for use as a GC carrier gas? Helium All of these Oxygen Nitrogen Helium All of these Oxygen Nitrogen ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What useful information can be found from a Van Deemter plot? The selectivity factor Optimum column temperature Optimum column length Optimum mobile phase flow rate The selectivity factor Optimum column temperature Optimum column length Optimum mobile phase flow rate ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography The column is heated to all of these prevent analyte condensation within the column control elution of the different analytes reduce band broadening to get sharper peaks all of these prevent analyte condensation within the column control elution of the different analytes reduce band broadening to get sharper peaks ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography In column switching chromatography 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 the flow to the column is switched on and off repeatedly one column is removed and replaced by another ANSWER DOWNLOAD EXAMIANS APP
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