Product Description
Eliminate ghost peaks traced back to the closure. These 9 mm caps carry an ultra-low bleed septum built for sensitive methods, helping keep baselines clean when detection limits are tight and every extraneous peak matters. It is a practical choice for LC-MS and GC-MS work where low background is essential.
This listing is for MicroLiter catalog number 09-0039N: µL 9mm Screw Caps with ULTRAPure Septa, PTFE / White Silicone, Pre-Cut, Pack of 100. Each natural polypropylene screw cap holds a friction-fit septum of blue/teal silicone laminated to white PTFE film, 1 mm thick. The septum is pre-cut, which eases needle penetration and helps prevent vacuum from forming in the vial during sample draws. Order it from LIGHT LABS and keep your lab stocked with genuine DWK Life Sciences products.
Key Features
- Ultra-low bleed silicone – Formulated to minimize extractable siloxane peaks.
- PTFE facing – White PTFE film presents an inert surface to the sample.
- Pre-cut septum – Easier needle entry and less coring.
- Friction fit – Septum sits securely in the natural polypropylene cap.
Specifications
| Catalog Number | 09-0039N |
| Brand | MicroLiter (DWK Life Sciences) |
| Description | µL 9mm Screw Caps with ULTRAPure Septa, PTFE / White Silicone, Pre-Cut |
| Sold As | Pack of 100 |
| Cap Size | 9 mm screw thread |
| Cap Material | Polypropylene, natural |
| Septa | PTFE / blue-teal silicone, 1 mm, pre-cut |
Applications
- LC-MS and trace analysis
- GC-MS methods sensitive to siloxanes
- Pharmaceutical impurity testing
- High-sensitivity autosampler work
