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Injection Port and Sample Injection in Gas Chromatography

The test sample is usually carried with the mobile phase. Then the test sample is gone through the stationary phase together with the mobile phase. In GC the test sample is inserted into the system via an injection port. 

Like in HPLC the test samples are injected into the chromatographic procedure. Injection is done through a self-sealing rubber system. And the test sample is injected using a gas-tight syringe. The gas tight syringe allows only micro liter amounts to be inserted in into the GC when using liquids as the testing sample. Then this is carried by the mobile gas. Together with the test sample the mobile gas is gone into the column where the stationary phase is present.

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