Summary:The sample bottle is a must for contamination detection. It is a qualified appliance that is cleaned according to the standard: ISO3722 "Appraisal of Hydraulic Drive·Sampling Container Cleaning Method". It is different from other liquid samplers, jus......
The sample bottle is a must for contamination detection. It is a qualified appliance that is cleaned according to the standard: ISO3722 "Appraisal of Hydraulic Drive·Sampling Container Cleaning Method". It is different from other liquid samplers, just a beverage bottle can be rinsed off.
The container that is cleaned by oneself is not clear about the pollution level of the inner cavity of the container (clean level RCL value), and the credibility of the final test result will be questioned.
There are three types of caps for sample vials: crimp caps, bayonet caps and screw caps. Each cap has its own advantages.
crimp cover Squeeze the septum between the rim of the glass vial and the folded aluminum cap. The sealing effect is very good, which can effectively prevent the sample from evaporating. When the injection needle of the autosampler pierces the sample, the position of the septum remains unchanged. The crimp cap sample bottle needs to be sealed with a capper to complete. For a few samples, a manual capper is a better choice. For a large number of samples, an automatic capper can be used. screw cap is universal. Tightening the cap will apply a mechanical force, squeezing the septum between the rim of the glass bottle and the aluminum cap. In the process of piercing and sampling, the screw cap has an excellent sealing effect and mechanically resists the septum. No tools are required for assembly. bayonet cover is an extension of the sealing method of the jaw cover. The plastic cap sleeved on the rim of the sample bottle forms a seal by squeezing the septum between the glass and the stretched plastic cap. The tension of the plastic cover is caused by its attempt to restore its original size. This tension creates a seal between the glass, bottle cap and septum. The plastic bayonet cap can be closed without any tools.The sealing effect of the bayonet cap is not as good as the other two sealing methods. ■ If the fit of the cap is very tight, it will be difficult to close the cap and may break. ■ If it is too loose, the vial sealing effect will be poor, and the septum may leave its original position.