Gas Chromatography Column Sample Pad Leaking or Damaged

The design of the gas chromatography septum is to maintain system integrity and seal at all times during the needle piercing, injection, and withdrawal process. Therefore, rubber or plasticized materials that can withstand certain temperatures and pressures are required to ensure this excellent sealing characteristic.

2) However, this type of pad will age and even leak over time with a certain number of use cycles, failing to meet the sealing requirements for gas chromatography instruments.

3) In some cases, when the gas chromatography injector pad becomes aged and damaged, its sealing performance degrades, leading to the inability of the carrier gas column's front pressure to reach the set requirements, resulting in a series of issues. Some more advanced instruments may even automatically shut down.

4) Leaks in the gas chromatography injector垫 can lead to a series of issues, including poor quantitative reproducibility and changes (increase) in the retention time of the analyzed samples. Therefore, the injector pads should be regularly checked and replaced; some gas chromatography technicians replace a new injector pad before each new sample analysis.