21st November 2019


What is gas chromatography and how does it work?

In gas chromatography, the carrier gas is the mobile phase. The rate of flow of the carrier is carefully controlled to give the clearest separation of the components in the sample. The sample being measured is injected into the carrier gas using a syringe and instantly vaporizes (turns into gas form).

Accordingly, what is the use of gas chromatography?

To separate the compounds in gas-liquid chromatography, a solution sample that contains organic compounds of interest is injected into the sample port where it will be vaporized. The vaporized samples that are injected are then carried by an inert gas, which is often used by helium or nitrogen.

What is a gas chromatograph mass spectrometer used for?

Gas chromatographymass spectrometry (GC-MS) is an analytical method that combines the features of gas-chromatography and mass spectrometry to identify different substances within a test sample.

What is the difference between HPLC and GC?

Both of them are effective ways to separate compounds for analysis. The most fundamental difference between GC and HPLC is their mobile phase. And this difference determines their different applications. GC, as its name indicating, using gas as its mobile phase, can analyze compounds which can be “dissolved” in gas.
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