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Autosampler septa material selection guide
2024-12-06
2024-12-06
2024-12-06
Autosampler septa, although they may be overlooked in laboratory work, are a vital component of the experimental process.The autosampler septa plays the role of protecting and sealing the sample, which not only affects the success of the experiment, but also directly relates to the guarantee of the quality of the sample.The influence of the choice of bedding material on the experiment and sample can not be ignored.Different bedding materials have different characteristics and advantages and are suitable for different application fields.
The Autosampler cap & septa is often a key component used to provide sealing performance and protect the sample from external contamination.Different types of sample caps can be made of different septa materials, depending on the needs of the experiment and the nature of the sample.Here are some common sample septa pad materials:
Polypropylene Plastics (PP)
Chemical resistant, commonly used in routine laboratory applications
Good chemical resistance, good resistance to acid and alkali solutions
Not suitable for high temperature and corrosive chemicals
Conventional laboratory, storage of acid-base solutions, organic solvents
Polytetrafluoroethylene (PTFE)
Non-adhesive, resistant to high temperatures and chemicals
Non-viscous, high temperature, chemical resistance
Hard, not suitable for some applications
Strong acid, strong base, high temperature, high vacuum applications
Nitrile, EPDM
Resistance to many chemicals, general sealing
Chemical resistance, good sealing
Poor corrosion resistance and not suitable for high temperature applications
General laboratory use, neutral solution
Silicone rubber (Si)
Good temperature resistance, oxygen and water resistance
Resistant to high temperatures and many chemicals
The tightness is relatively poor and is not suitable for high vacuum applications
High temperature applications, oxygen sensitive samples, neutral solutions