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Here we mainly talk about how the syringe of the gas chromatograph is cleaned and maintained.
1: The inner wall of the syringe can be cleaned with an organic solvent. When cleaning, please check if the needle plunger can move smoothly.
2: If the needle pusher does not move smoothly, the pusher can be removed. It is recommended to wipe it clean with a soft cloth dampened with organic solvent.
3: Reuse organic solvent pumping. If the resistance to the needle plunger is increased rapidly after several suctions, there is still some small dirt present. Repeat the cleaning process after this happens.
4: If the needle plunger can move smoothly and smoothly, check if the needle is clogged.
The needle is repeatedly rinsed with an organic solvent to check the shape of the sample being pushed out of the needle.
If the needle is normal, the sample will flow out in a straight line. If the needle is clogged, the sample will be sprayed in a fine mist from one direction or one angle. Even if the solvent flows out in a straight line, carefully check the flow. The situation is better than normal (compared to a new unblocked GC syringe).
5: Blockage in the needle can destroy the reproducibility of the analysis; for this reason the maintenance of the needle is necessary.
Remove the blockage from the needle with something such as a wire. The needle can only be used if the sample is flowing normally.
Contaminants in the needle can also be effectively removed using an aspirator aspirate or GC syringe cleaner.
This is the end of the introduction of How can I maintain the GC syringe. I hope it can help you.
