Headspace analysis is to determine the content of these components in the original sample by the gas composition above the sample matrix. Traditional liquid-liquid extraction and SPE are to dissolve the sample in the liquid, and it is inevitable that there will be some co-extraction interference analysis. Moreover, the purity of the solvent itself is also an issue, which is particularly important in trace analysis, and unnecessary interference is inevitable when the gas is used as a solvent, because high-purity gas is easily available and the cost is low.

　　headspace samplerIn the headspace analysis, the understanding and preparation of sample properties, as well as the control of sample volume, the setting of equilibrium temperature and equilibrium time, play an important role in how to improve the recovery rate of standard samples. At the same time, in the capillary chromatography analysis of gas chromatography sampled by headspace sampler, the sample obtained by headspace sampling is generally pre-concentrated by the method of low temperature column head, and then the method of programmed temperature rise is adopted, this allows for good separation and larger volumes of gaseous sample injection.

Headspace analysis is a convenient and fast sample pretreatment method in gas chromatography. The principle is that the sample to be tested is placed in a closed container, the volatile components are volatilized from the sample matrix by heating, the equilibrium is reached in the gas-liquid (or gas-solid) two-phase, and the top gas is directly extracted for chromatographic analysis.

Beijing Bei Fen Tianpu Instrument Technology Co., Ltd. is committed to the development of high-efficiency gas chromatographic columns, special analytical columns and chromatographic accessories. At the same time, it has independently developed high-quality gas chromatographs, automatic thermal desorption instruments, automatic headspace samplers, and gas sources. Generators and other series of products, I also sincerely thank friends from all walks of life for their trust and support to Tianpu over the years. I hope we will continue to increase contact and develop together.