Quartz capillary gas chromatography columnIt is a core consumable in gas chromatography analysis, and its performance directly affects separation efficiency and analysis accuracy. Its inner wall is coated with a fixed phase (such as polysiloxane), and separation is achieved through the interaction between the compound and the fixed phase, making it suitable for complex mixture analysis.
Installation steps:
Preparation and Inspection:
Ensure that accessories such as carrier gas, injection pad, and liner are functioning properly, and cool the column box during high-temperature disassembly and assembly.
Clean the interface graphite residue with tweezers to avoid blockage.
Cutting and connection:
Cut the column head 2-3cm at a 30 ° angle using a ceramic cutting blade to ensure a smooth and burr free cut.
The tip of the graphite pressure ring should face towards the column mouth, and after inserting it into the injection port, mark the length of the exposed column (2-4mm).
Fixed and leak detection:
The bracket hooks need to be installed at 120 ° intervals, with the chromatographic column hang tag facing outward.
Immerse the column end in water to observe bubbles and confirm that there is no leakage, with a gas load of 0.05MPa.
Installation and maintenance:
Attention should be paid during installation:
The cutting column head should be flat to avoid burrs affecting the sealing.
When connecting the injection port, the graphite pressure ring should face towards the column port to ensure airtightness.
Aging chromatography columns to remove residual solvents and extend their service life.