Gas Chromatography Quiz

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

• To react with the analyte

• To ionize the sample

• To cool the column

• To transport the analyte through the column

Which type of chromatography uses a liquid stationary phase?

• Solid-solid chromatography (SSC)

• Gas-liquid chromatography (GLC)

• Gas-solid chromatography (GSC)

• Liquid-liquid chromatography (LLC)

What is the typical temperature of the sample port during injection?

• The same as the oven temperature

• 100 °C

• At room temperature

• 50 °C higher than the boiling point of the least volatile component

Which detector is known for its sensitivity to organic compounds that can be ionized?

• Thermal Conductivity Detector (TCD)

• Mass Spectrometer (MS)

• Electron Capture Detector (ECD)

• Flame Ionization Detector (FID)

What is the main advantage of using a capillary column in gas chromatography?

• It can accommodate larger samples

• It provides high resolution and sensitivity

• It is easier to clean

• It is less expensive

What is the purpose of temperature programming in gas chromatography?

• To cool the column

• To increase the elution rate of late peaks

• To reduce the sample size

• To maintain a constant temperature

Which of the following is a disadvantage of using hydrogen as a carrier gas?

• It is explosive

• It is expensive

• It has long run times

• It is not readily available

What is the main characteristic of a Flame Ionization Detector (FID)?

• It is sensitive to all compounds

• It operates at low temperatures

• It is non-destructive

• It is destructive and not suitable for non-combustibles

What type of sample introduction mode is used for concentrated samples?

• Batch mode

• Continuous mode

• Split mode

• Splitless mode

Which stationary phase property is desirable for gas chromatography?

• High reactivity

• Thermal stability

• Low boiling point

• High volatility