29492-U
Closures with pre-cut septa, pk of 100
size 11 mm, Snap cap, soft version, transparent polyethylene, red PTFE/silicone, thickness 1.0 mm
Sign Into View Organizational & Contract Pricing
All Photos(1)
About This Item
UNSPSC Code:
41122001
NACRES:
NB.11
Recommended Products
material
red PTFE/silicone
transparent polyethylene
hardness
55 (Durometer: shore A)
packaging
pack of 100
size
11 mm
thickness
1.0 mm
Looking for similar products? Visit Product Comparison Guide
General description
Pre-cut septa: The silicone material is cut through in Y-form while the PTFE layer remains uncut. The silicone layer represents 95% of the total septa thickness while the PTFE layer is only 5% or less.
The Y-form shape of the cut was chosen for several reasons. Since the PTFE layer is uncut, this product provides protection against contamination until the needle pierces through it. The needle can easily penetrate through the Y-slit of the septa material (only the thickness of the PTFE layer needs to be penetrated by the needle). Less pressure is required for the autosampler needle to penetrate the pre-cut septa, resulting in fewer bent and/or broken needles.
The uncut PTFE layer provides a better seal than other commercially solid slitted septa until the needle punctures the septa. The Y-shaped cut allows air to ener the vial eliminating vacuum formation. The design provides the needle with a larger target area for penetration even when the needle doesn′t come down in the center of the septa.
The Y-form shape of the cut was chosen for several reasons. Since the PTFE layer is uncut, this product provides protection against contamination until the needle pierces through it. The needle can easily penetrate through the Y-slit of the septa material (only the thickness of the PTFE layer needs to be penetrated by the needle). Less pressure is required for the autosampler needle to penetrate the pre-cut septa, resulting in fewer bent and/or broken needles.
The uncut PTFE layer provides a better seal than other commercially solid slitted septa until the needle punctures the septa. The Y-shaped cut allows air to ener the vial eliminating vacuum formation. The design provides the needle with a larger target area for penetration even when the needle doesn′t come down in the center of the septa.
related product
Product No.
Description
Pricing
Choose from one of the most recent versions:
Certificates of Analysis (COA)
Lot/Batch Number
It looks like we've run into a problem, but you can still download Certificates of Analysis from our Documents section.
If you need assistance, please contact Customer Support
Already Own This Product?
Find documentation for the products that you have recently purchased in the Document Library.
Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.
Contact Technical Service