Gas chromatography is one of the most sensitive and commonly used analytical techniques for the separation and determination of various compounds, such as the components of mixtures of volatile or semivolatile compounds (VOCs). It has applications in environmental and forensic science.
In gas chromatography (GC) the mobile phase is typically an inert gas and the analyzed compounds interact with the stationary phase inside the column. Samples are volatilized and separated on a column. The technique is especially powerful when a mass spectrometer is used as a detector as individual components can then be characterised and identified directly.
The use of water within the process of gas chromatography is rather limited, however water will be required for sample preparation. In addition, water will be used for blank preparation and sample standards if the sample being analyzed is of an aqueous nature.