If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
Many consider the traditional Thermogreen LB-2 septa as the benchmark for low bleed GC septa. Rubber formulation exclusive to Supelco "Often mimicked, never duplicated" Now, the best septa formulation is offered in a molded design.
Every septum conforms to the same mold shape with crisp, clean sides, resulting in easier installation and better sealing.
These septa have several benefits.· The exclusive rubber formulation provides ultra low bleed over a wide range of inlet temperatures (100 °C to 350 °C).· No foreign substances or powders (which could contaminate the inlet) are used during manufacturing.· All septa are fully tested for bleed and contamination.· All septa are pre-conditioned, therefore, they are ready to use.· They are ideal for use with low bleed GC-MS columns.
The versions are designed as follows:· The version with an injection hole is designed for customers who use autosamplers. This version is also suited for users of solid phase microextraction (SPME).o A dimpled center guides the needle through the septa.o Allows needle penetration through the same location, time after time.o Reduces septum coring, preventing septum fragments from entering the injection port.o Have a high puncture tolerance and long life.· The version without an injection hole is designed for customers who do not use autosamplers.
Yes. These are superior in all areas to die-cut septa as well as molded septa from other manufacturers.
Higher temperature does not relate to higher quality when discussing GC septa.· To make septa with a higher temperature, they need to be stiffer. This makes them harder to puncture, resulting in shorter life.· GC users typically do not use an injection port temperature above 350 °C. We choose to make softer septa that result in easier penetration, less coring, and long life.
Please see the product information sheet (under Documents, above).
There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote. USA customers: 1-800-325-3010 or view local office numbers.
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