DIN ISO 9001:2015 certified
costs from €250
Products
Bottle Septa
The applied septum is crucial for optimal analysis. Primarily, the septum should be inert to the sample solution and at the same time protect it from outside contamination as well as from possible evaporation. Almost all sealing discs are coated on one side with PTFE (Polytetrafluoroethylene), which has a high chemical resistance and forms an inert barrier between the sample and the carrier material of the septum. The carrier materials have different physical and chemical properties, e.g. temperature resistance, reclosing properties, purity, hardness, thickness, etc. We offer bottle septa with a diameter of 8mm to 22mm. Select the needed size in the drop down menu on the left. Choose from septa by PerkinElmer and our home brand Altmann Analytik. These septa are a low cost and high quality alternative.
Properties and applications of septa made of TEF, PTFE, butyl, silicone etc.
| Naturkautschuk /TEF | ||
| Application: | HPLC/GC | |
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• Standard quality for HPLC |
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| RedRubber / PTFE (synthetic rubber) | ||
| Application: | HPLC/GC | |
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• NEW standard quality for HPLC and GC |
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| Butyl (septa / stopper) | ||
| Application: | Headspace | |
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• In the absence of a PTFE coating, only for uncritical analyzes |
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| Pharma-Fix Septum Butyl / PTFE | ||
| Application: | GC/HPLC/Headspace | |
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• Specialty: Pharma-Fix washer only centric PTFE-coated butyl disc; The elastic butyl lying on the glass edge achieves a significantly better seal than the slippery surface of a completely laminated sealing disc |
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| (PTFE /) silicone / PTFE | ||
| Application: | GC/HPLC/Headspace | |
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• Silicone is the purest synthetic elastomer and is therefore used for critical analyzes |
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| Silicon / aluminum foil | ||
| Application: | Headspace | |
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• All chemical and physical properties, such as silicone / PTFE |
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| Pure PTFE septa | ||
| Application: | HPLC | |
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• Very inert, therefore also as a coating on most other sealing discs |
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Durometer (hardness of the septum)
Durometer is the hardness of a septum, expressed in ° shore. The higher the "shore" number, the harder the septum, the lower the "shore" number, the softer the septum. The softest sealing disc is 45 ° shore A and the hardest 70 ° shore A is hard. In addition to the thickness of the disc, the hardness is an important indicator, which septum is suitable for the penetration of a certain needles (sensitive needles, thin or thick needles, pointed or blunt needles, etc.).