Full mode headspace samplerIt is a convenient and fast sample pretreatment method in gas chromatography. Its principle is to place the sample to be tested in a closed container, heat and raise the temperature to make the volatile components evaporate from the sample matrix, reach equilibrium in the gas-liquid (or gas-solid) phase, and directly extract the top gas for chromatographic analysis to test the composition and content of volatile components in the sample. The use of a full mode headspace sampler for headspace sampling technology can eliminate the tedious sample pretreatment process, avoid interference from organic solvents in analysis, and reduce contamination of the chromatographic column and injection port. The full mode headspace sampler can be connected to various models of gas chromatographs both domestically and internationally. For other gas chromatography sample processing techniques, the full mode headspace sampler eliminates complex and error prone steps. It can enable you to obtain a large amount of useful information in a relatively short period of time.

In chromatographic analysis, improving work efficiency (i.e. the number of samples that can be analyzed per unit time) has always been a goal pursued by people. From packed columns to capillary tubes, from manual injection to automatic injection, from conventional chromatography to rapid chromatography, all have improved work efficiency. From the current instruments,Full mode headspace samplerThe analysis time itself is already quite short. In contrast, sample processing is often the most time-consuming. Statistics show that chromatography laboratories typically spend 60% of their time processing samples, while true GC analysis only takes 10% to 15% of the time. The rest of the time is spent on data processing and report editing. So how to accelerate or simplify sample processing has become a key issue in improving work efficiency. Many good methods have been developed in this area, such as solid phase extraction (SPE), solid phase microextraction (SPME), supercritical fluid extraction (SFC), etc. However, if we are only interested in the volatility of complex samples, such as organic volatiles in wastewater, alcohol content in the blood of drunk drivers, etc., using the above extraction methods is obviously time-consuming. In this case, full mode headspace sampler analysis is often a simple and effective method. The so-called full mode headspace sampler analysis is to take the gas phase above the sample matrix (liquid and solid) for chromatographic analysis.

The full mode headspace sampler is a convenient and fast sample pretreatment method in gas chromatography. The principle is to place the test sample into a closed container, heat it to evaporate the volatile sample from the body, reach equilibrium in the gas-liquid phase, and then directly extract the top gas for gas chromatography analysis. Finally, the composition and content of volatile components in the sample are tested. Because the full mode headspace sampler makes it extremely easy to achieve solvent-free extraction of liquid and solid samples, it can be said to fundamentally eliminate errors and problems that may occur in sample pretreatment methods such as adsorption desorption and solvent extraction. Generally speaking, the headspace injection gas chromatography analysis method has the following advantages compared to direct injection, solvent extraction, and adsorption desorption injection methods:

1. Accurate, simple, fast, convenient, automatic, and environmentally friendly;

2. High sensitivity analysis of volatile components in samples;

3. Since high boiling point components are not introduced into GC,Full mode headspace samplerCan shorten analysis time and double work efficiency;

4. Due to the fact that high boiling point components are not introduced into the GC, contamination of the analysis system by high boiling point components is avoided, thereby reducing the daily maintenance work of the full mode headspace sampler and extending the lifespan of certain key components such as the sampler, chromatographic column, detector, etc.