<p style="text-align:justify">Gas chromatography (GC) is a common type of chromatography used in analytical chemistry to separate and analyze compounds that can be vaporized without decomposition. Typical applications of GC include testing the purity of a particular substance or separating different components of a mixture. In preparative chromatography, GC can be used to prepare pure compounds from mixtures. In general, substances that vaporize below 300°C (and are therefore stable at that temperature) can be measured quantitatively. Samples are also required to be salt-free; they must not contain ions.</p>
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