How to prevent the injection needle from bending when installing the column - Database & Sql Blog Articles

The probe high frequency needle JT-CT has a needle core that can pass 3 amp high frequency needle

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Many newcomers to chromatographic work often bend the needle and syringe shaft of a syringe for:
1. The injection port is too tight, and the screw is too tight at room temperature. When the temperature of the vaporization chamber rises, the silicone gasket will expand more tightly, and the syringe is difficult to get stuck.
2. Position is not good to find the needle stuck in the metal part of the inlet.
3. The syringe shaft bend is too strong when injecting, and the inlet chromatograph has an injector frame. When the sample is loaded with the injector frame, the syringe rod will not be bent. 4. Because the inner wall of the syringe is contaminated, the needle bar is pushed at the time of injection. When the syringe is used for a while, it is found that there is a small black piece near the top of the needle tube. At this time, the injection of the sample is difficult. The cleaning method pulls out the needle bar, injects a little water, inserts the needle bar into the polluted position and pushes and pulls it repeatedly. Once again, it can not inject water until the contaminants are removed. At this time, you will see the water in the syringe become cloudy. Pull the needle bar out and wipe it with filter paper, then wash it several times with alcohol. When the sample to be analyzed is a solvent-dissolved solid sample, the syringe should be washed with a solvent in time. 5. Be sure to be steady when injecting. If you are eager to hurry, you will bend the syringe. As long as you are proficient in the injection, it will be faster.