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GC injection valves are responsible for the precise and controlled introduction of the sample into the gas chromatographic analysis path. These valves allow the sample to enter the heated injection port where it is immediately vaporised and transported into the GC column. There are various injection techniques, each utilising their own specific injection valves. The most common methods include direct injection, split injection, splitless injection and on-column injection. Here you will find suitable injection ports from GL Sciences, Agilent, Restek, Trajan.