Gas Chromatography Quiz

What is the principle of separation in gas chromatography?

• Absorption

• Partition

• Size exclusion

• Ion exchange

Which type of gas chromatography column is densely packed with finely divided, inert, solid support material coated with liquid stationary phase?

• Support-coated column

• Packed column

• Capillary column

• Wall-coated column

What is the function of the carrier gas in gas chromatography?

• To transport the sample through the column

• To analyze the sample

• To vaporize the sample

• To detect the components of the sample

Which detector in gas chromatography is based on the fact that the heat lost from a filament depends upon the thermal conductivity of the surrounding gas?

• Flame ionization detector

• Electron capture detector

• Flame photometric detector

• Thermal conductivity detector

What is the retention time in gas chromatography?

• The time taken for the sample to reach the detector

• The time taken for the sample to elute about half of the solute through the column

• The time taken for the sample to show maximum peak after injecting

• The time taken for the sample to vaporize

Which type of gas chromatography detector is highly sensitive for the detection of compounds like halogens, quinones, peroxides, and nitrites?

• Thermal conductivity detector

• Flame ionization detector

• Electron capture detector

• Flame photometric detector

What is the purpose of equilibrating the column in gas chromatography?

• To increase the temperature of the column

• To allow continuous flow of carrier gas through the column for a specific duration of time

• To remove impurities from the column

• To cool down the column

Which gas is commonly used as the carrier gas in gas chromatography?

• Carbon monoxide

• Oxygen

• Methane

• Hydrogen

What is the function of the sampling unit in gas chromatography?

• To detect the components of the sample

• To control the pressure of the carrier gas

• To maintain the temperature of the sample

• To introduce the sample into the injection port

Which type of gas chromatography column is lined with a thin layer of support material onto which the stationary phase has been adsorbed?

• Wall-coated column

• Packed column

• Support-coated column

• Capillary column