Description of Septa And Cap for Crimp Top Sample Vials
Hawach Scientific Co., Ltd crimp caps provide excellent sealing, reducing the chance of sample evaporation. The cover is made of aluminum cover and can be sealed with special tools to achieve a good sealing effect. Compared with the septa and cap for screw thread sample vials, it is more resistant to high temperatures in high-temperature experimental environments and can adapt to harsh experimental conditions.
40°C to 200°C temperature range
Pre-assembled caps save you time and reduce contamination
Advantages of Septa And Cap for Crimp Top Sample Vials
Good quality control
Consistent quality between each batch
The strict sealing technique of the gland reduces the evaporation probability of the sample
Air Tightness Test for Caps and Septa
To compare the airtightness property of Hawach cap and PTFE/Silica septa and the same type products of a world well-known brand A;
Firstly, inject 1 ml ethanol and DI water into 2 ml Hawach and brand A sample vial, and then use a microneedle to insert the cap and septa separately for every 30 mins, weigh them after every injection, and record the result.
Experiment result and discussion:
As shown in Table 1, we can see that after 5 times injects and a period of evaporation, the total evaporation weight of ethanol for Hawach and brand A are 0.003g and 0.002g separately, corresponding to the mass loss rate are 0.08% and 0.06% for them.
From table 2, the total evaporation weight of water for Hawach and brand A is 0.001g and 0.002g separately, corresponding to the mass loss rates are 0.03% and 0.06% for them.
Both the ethanol and water mass loss rate are smaller than the standard level of 1.5% ± 0.5% and the test result of Hawach is very similar and even better than the one of world-famous brand A, which indicates that Hawach caps and PTFE/Silica septa have very good airtightness when using no matter in an organic solvent and water content solvent