Shanghai headspace sampler deviceworking principle:

In the analysis and detection process using headspace gas chromatography, the headspace sampler used is a sample pretreatment instrument. The working principle of headspace gas chromatography is to place the sample to be tested in a closed container, heat and raise the temperature to evaporate the volatile components 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 headspace injection technology can eliminate lengthy and tedious sample pretreatment processes, avoid interference from organic solvents in analysis, and reduce contamination of chromatographic columns and injection ports.

Shanghai headspace sampler deviceWorkflow:

Sample heating injection - pressurization - sampling - sample filling into quantitative tube - six way valve switching injection - starting workstation to start sampling data, etc

Category:

At present, the headspace samplers produced domestically and internationally can be divided into the following three categories: manual headspace samplers, fully automatic headspace samplers, and semi-automatic headspace samplers.

Structural characteristics
1. The pump and injection valve are combined for negative pressure sampling, without the dilution effect of external added gas, with high sensitivity and precise quantification;
2. The uniformly distributed sample heating position of the headspace sampler reduces the temperature gradient between different bottle positions and improves the stability of the analysis results;
3. Valves, quantitative loops, and sample transfer pipelines can control temperature to prevent sample condensation during transport;
4. The headspace sampler tubing and injection valve are equipped with blowback function to prevent cross contamination;
5. Microcomputer control, LCD display temperature parameters, and thin film keyboard input;
6. Temperature and power outage protection, safe to use;
7. The needle of the headspace sampler can be freely replaced, making it convenient to connect various models of gas chromatographs at home and abroad

Application areas of headspace sampler:

Forensic Science: Testing for volatile toxins such as alcohols, aldehydes, and ketones in blood and urine.

Traffic safety: Testing the blood alcohol content of vehicle drivers when drinking or driving under the influence of alcohol.

Brewing industry: determination of low boiling point aroma components in beer.

Food industry: detection of solvent residues in extracted oil.

Environmental protection: determination of volatile halogenated hydrocarbons in surface water and tap water such as rivers, lakes, etc.

Pharmaceutical industry: detection of residual solvents in drugs.

Material control: detection of residual acetaldehyde in beverage bottles.