Description
Magnetic screw cap N 18-L is a silver open-top magnetic closure for chromatography sample vials, combining a magnetic shell with a blue transparent silicone and white PTFE septum. Septum hardness is 45° Shore A and septum thickness is 1,5 mm, supporting controlled needle penetration and a dependable seal during GC and HPLC sample introduction. Supplied in packs of 100 pieces, this N 18-L format from manufacturer Macherey-Nagel suits laboratories that use magnetic autosampler trays and need consistent vial pick-up and positioning. The dual-layer septum pairs elastic silicone with a chemically resistant PTFE contact face suited to many organic solvents in sample preparation and analysis. Open-hole (L) geometry leaves the septum accessible for injection, while the silver finish aids visual identification among other closures. As chromatography accessory hardware it helps maintain workflow reliability when sealing threaded N 18 vials for routine quantitative and qualitative work. Choose it wherever magnetic handling, defined Shore hardness and PTFE-faced sealing are required for analytical sample integrity on automated systems.
This article is part of Vial caps & septa, in Vials, caps & septa.
Key features
- Pack size: 100 pc(s)
- Type: Magnetic screw cap N 18-L, open top
- Colour: Silver
- Septum: Silicone blue transparent/PTFE white
- Hardness: 45° Shore A
- EAN: 4046681086281
Recently viewed
You may also like
Browse related categories
Category
Sub-category
Catalogue
Brand
Questions about Mg SC N18-H,si, Sil bltr/PTFEw, 45°, 1.5
What is this article?
Mg SC N18-H,si, Sil bltr/PTFEw, 45°, 1.5 is the article on this page. Luminix Health distributes Macherey-Nagel for laboratory use. It sits in Vial caps & septa, inside Vials, caps & septa, in Chromatography equipment.
A vial cap and a septum have to match the vial neck: crimp, screw or snap, and the diameter. The septum material, PTFE/silicone or rubber, decides chemical resistance and how many times a needle can pierce it. A septum that sheds into the solvent becomes ghost peaks.
An autosampler vial is the small closed bottle a chromatograph picks up. The neck is crimp, screw or snap, and the cap and the septum have to be that neck. The septum is the part the needle pierces. A soft septum reseals. A septum that is wrong for the solvent swells or sheds particles into the sample. Inserts reduce the volume when the sample is scarce. The separation they feed is described with IUPAC names and PubChem data.
Which category should I open next?
The category is Vials, caps & septa. The sub-category is Vial caps & septa. The catalogue is Chromatography equipment.
Shelves beside this one are Chromatography accessories, Autosampler vials, Crimpers & decappers and Vial inserts.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Delivery across Europe, two to five days when in stock. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.
