Automatic headspace sampler is a convenient and quick sample pretreatment method in gas chromatography. The principle is to put the sample to be tested into a closed container, the volatile components are volatilized from the sample matrix by heating, the gas-liquid (or gas-solid) two-phase equilibrium, the top gas is directly extracted for chromatographic analysis, and the composition and content of the volatile components in the sample are tested.

Ceiling sampling technology can avoid the tedious sample pretreatment process, avoid the interference of organic solvents on the analysis, and reduce the pollution of the column and feed inlet. After the ceiling bottle is sealed, put the manual code on the conveyor belt or turntable. Ceiling bottles will enter the thermostatic oven in chronological order compiled by the user. After the constant temperature time arrives, the manipulator will automatically sample and the system will automatically sample.

The constant temperature furnace station adopts a circumferential distribution design, which is more reasonable, reduces the temperature gradient of all top bottle heating positions, and improves the stability and reliability of the analysis results. The injection needle can be replaced freely, which is convenient to connect various types of gas chromatographs at home and abroad.

The automatic headspace sampler adopts liquid crystal display, free switching between Chinese and English, thin-film keyboard, digital input, liquid crystal display: method parameter setting, real-time working status, running time, year, month, day, etc. There is a comprehensive self-test program, sample tray automatic positioning system, complete fault alarm, fault prompt function. It is convenient to deal with the problems encountered in the analysis in time. The system reserves a set of default analysis methods, allowing users to store a variety of commonly used analysis methods and mixed operation analysis methods.

For other gas chromatographic sample processing techniques, the headspace sampler eliminates complex and error-prone steps. It allows you to get a lot of useful information in a short time. At present, the classification of headspace sampler can be divided into manual, automatic and semi-automatic.

The above is the introduction of the automatic headspace sampler.