What is another name for gas chromatography?

Gas chromatography is also sometimes known as vapor-phase chromatography (VPC), or gas–liquid partition chromatography (GLPC).

What is gas chromatography simple explanation?

Gas chromatography (GC) is an analytical technique used to separate the chemical components of a sample mixture and then detect them to determine their presence or absence and/or how much is present. These chemical components are usually organic molecules or gases.

What does a gas chromatography graph tell you?

A GC chromatogram (Figure 2) is a visual output of the data recorded by the detector. It is presented as a plot of detector response (y-axis) versus retention time (x-axis). If you injected a mixture and the chromatogram shows three peaks, then this tells you that the sample had three different compounds.

How do you interpret gas chromatography results?

How to Read GC/MS Chromatograms

1. The X-Axis: Retention Time. Usually, the x-axis of the gas chromatogram shows the amount of time taken for the analytes to pass through the column and reach the mass spectrometer detector.
2. The Y-Axis: Concentration or Intensity Counts.
3. Differences in Gas Chromatogram Models.

How is gas chromatography different from other methods?

Gas chromatography differs from other forms of chromatography in that the mobile phase is a gas and the components are separated as vapours. It is thus used to separate and detect small molecular weight compounds in the gas phase. The sample is either a gas or a liquid that is vaporized in the injection port.

What kind of instrument is a gas chromatograph?

Gas chromatograph is an analytical instrument used to analyze the different components in a sample. An analytical method using a gas chromatograph is called gas chromatography (GC).

Which is the stationary phase of gas chromatography?

The stationary phase is either a solid adsorbant, termed gas-solid chromatography (GSC), or a liquid on an inert support, termed gas-liquid chromatography (GLC). In early 1900s, Gas chromatography (GC) was discovered by Mikhail Semenovich Tsvett as a separation technique to separate compounds.

How big is the sample size for gas chromatography?

Typically the sample size is small — in the microliters range. Although the sample starts out as a liquid, it is vaporized into the gas phase. An inert carrier gas is also flowing through the chromatograph. This gas shouldn’t react with any components of the mixture.