Gas Liquid Chromatography Quiz

What is one of the main applications of Gas Liquid Chromatography in forensics?

• Measuring radiation levels

• Detecting metal ions

• Analyzing volatile compounds

• Identifying DNA sequences

What is the role of the stationary phase in Gas Liquid Chromatography?

• To provide a surface for the mobile phase to move

• To react with the sample

• To separate components based on their interaction

• To cool down the sample

Which of the following gases is commonly used as a carrier gas in GLC?

• Oxygen

• Helium

• Carbon Dioxide

• Hydrogen

How is the sample introduced into the gas chromatograph?

• Through a funnel

• With a pipette

• Using a syringe

• By pouring it directly

What happens to the sample once it is injected into the gas chromatograph?

• It is volatilized

• It is cooled down

• It is mixed with a reagent

• It is dissolved in a solvent

Which detection method is most commonly used in Gas Liquid Chromatography?

• Infrared spectroscopy

• Nuclear magnetic resonance

• Mass spectrometry

• Ultraviolet spectroscopy

Why is Gas Liquid Chromatography not suitable for analyzing ionic compounds?

• They react with the carrier gas

• They cannot be volatilized

• They are too volatile

• They are too small

What does a longer retention time indicate about a compound in GLC?

• It is less reactive

• It is more volatile

• It has a lower molecular weight

• It interacts more with the stationary phase

How does temperature control affect the separation process in GLC?

• Higher temperatures increase separation speed

• Temperature control is only for safety

• Lower temperatures decrease separation quality

• Temperature has no effect on separation

What is the primary purpose of controlling the temperature in the GLC oven?

• To prevent the sample from freezing

• To maintain the pressure inside the column

• To control the speed and resolution of separation

• To ensure the sample remains a liquid