In the headspace analysis of the headspace sampler, the understanding and preparation of the properties of the sample, as well as the control of the sample volume, the setting of the equilibrium temperature and the equilibration time, play an important role in how to improve the recovery rate of the standard sample. At the same time, in the headspace sampler gas chromatography capillary chromatography, the sample obtained from the headspace sampling is generally pre-concentrated by the method of low temperature column head, and then the temperature is programmed, so that a good separation effect can be obtained. A larger volume of gaseous sample can be injected.
Headspace analysis technology is a convenient and fast sample preparation method in gas chromatography. The principle is to put the sample to be tested into a closed container, and the volatile components are volatilized from the sample matrix by heating and heating. Equilibrium is achieved in the gas-liquid (or gas-solid) phase, and the top gas is directly extracted for chromatographic analysis.
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