Gas Chromatography Quiz

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Questions and Answers

What is the function of the stationary phase in gas chromatography?

Recording the components as a sequence of peaks
Moving the sample through the column
Interacting with the gaseous compounds being analyzed (correct)
Serving as the carrier gas

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

Oxygen
Carbon dioxide
Helium (correct)
Hydrogen

What is the purpose of injecting a vaporized sample onto the chromatographic column in gas chromatography?

To start the separation process (correct)
To interact with the stationary phase
To serve as the carrier gas
To record the components as a sequence of peaks

What gives gas chromatography its analytical usefulness?

<p>Comparison of retention times (B)</p> Signup and view all the answers

Which type of gas chromatography involves a microscopic layer of liquid or polymer on an inert solid support inside a piece of glass or metal tubing called a column?

<p>GLC (D)</p> Signup and view all the answers

Flashcards

Stationary Phase in Gas Chromatography

In gas chromatography, the stationary phase interacts with the gaseous compounds that are being analyzed. This interaction is crucial for separating different components of the mixture.

Carrier Gas in Gas Chromatography

Helium is commonly used as a carrier gas in gas chromatography due to its inert nature, high diffusion rate, and availability.

Sample Injection in Gas Chromatography

Injecting a vaporized sample onto the chromatographic column starts the separation process in gas chromatography. The compounds in the sample are then carried by the carrier gas and interact with the stationary phase.

Analyzing Retention Times in GC

Gas chromatography provides its analytical usefulness by comparing the retention times of different compounds. The time it takes for a compound to travel through the column is unique to each substance.

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Gas-Liquid Chromatography (GLC)

Gas-liquid chromatography (GLC) is a type of gas chromatography where a thin layer of liquid or polymer coats an inert solid support inside a column. This liquid layer acts as the stationary phase.

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Study Notes

Gas Chromatography Fundamentals

The stationary phase in gas chromatography is responsible for separating the components of a mixture based on their interactions with the stationary phase.

Carrier Gas

The carrier gas, typically an inert gas such as helium, nitrogen, or argon, plays a crucial role in gas chromatography as it transports the sample through the column.

Sample Injection

Injecting a vaporized sample onto the chromatographic column allows the components of the mixture to separate and interact with the stationary phase.

Analytical Usefulness

The ability to separate, identify, and quantify the components of a mixture gives gas chromatography its analytical usefulness.

Types of Gas Chromatography

Gas-liquid chromatography (GLC) involves a microscopic layer of liquid or polymer on an inert solid support inside a piece of glass or metal tubing called a column.