Laboratory ND18 magnetic precision Screw Headspace Vial
The vial has an 18mm outer diameter, which is a standard size for screw-cap headspace vials. It is designed to hold gas or liquid samples for analysis. The material of Headspace Vials is low extractable Borosilicate glass with a low expansion rate, high-temperature resistance, high strength, high hardness, high light transmittance, and high chemical stability. Headspace Vials are suitable for headspace analysis of volatile solids and gases. A headspace vial is used in the process of top–gas chromatography. When detecting volatile or semi-volatile mixtures with high boiling points, we need to heat them to vaporize them at the top. In this process, since the liquid samples are at the bottom, the material in the top gas can be measured without touching the liquid in the sample vial.
The 18mm Screw Headspace Vial has an 18mm outer diameter, which is a standard size for screw-cap headspace vials. It is designed to hold gas or liquid samples for analysis. The material of Headspace Vials is low extractable Borosilicate glass with a low expansion rate, high-temperature resistance, high strength, high hardness, high light transmittance, and high chemical stability. Headspace Vials are suitable for headspace analysis of volatile solids and gases. An 18mm Screw Headspace Vial is used in the process of top–gas chromatography. When detecting volatile or semi-volatile mixtures with high boiling points, we need to heat them to vaporize them at the top. In this process, since the liquid samples are at the bottom, the material in the top gas can be measured without touching the liquid in the sample vial.
Unlike crimp-top vials, screw-headspace vials have a threaded neck that allows for easy sealing and resealing with a compatible screw cap. This design is convenient for repeated access to the sample without the need for specialized crimping tools.
Application
The 18mm Screw Neck Vials with Magnetic Screw Seals for CTC are novelties in the crimped neck-dominated Headspace market. However, especially for the hard-to-crimp magnetic caps, screw closures are a convenient alternative. The vials are preferentially used on instruments: CTC PAL, Varian, Gerstel, Atas, Shimadzu, and Agilent.
The caps with an aluminum skirt and a magnetic central disk, are easy to crimp and decamp.
Advantages
1. Screw-cap vials are easy to seal and reseal without the need for specialized crimping tools. This makes them convenient for repeated access to the sample, reducing the time and effort required for sample handling.
2. These 18mm Screw Neck Vials are suitable for a wide range of applications, including gas chromatography, headspace analysis, and sample storage. Their versatility makes them valuable in various laboratory settings.
3. The screw-cap design provides an airtight seal, preventing the escape of volatile compounds and ensuring the sample’s integrity during storage and analysis.
4. Borosilicate glass construction ensures resistance to chemical interactions, safeguarding against sample contamination.
5. Many of these vials have designated areas for labeling, simplifying sample identification and record-keeping in the laboratory.
6. Universal use for Headspace and SPME due to thinner septa.
7. Special pre-cut septa (silicone layer is slitted but PTFE remains intact) for safe penetration of the sensitive SPME phase with hardly any coring.
Matching Caps and Septa
The 18mm septa uses only the highest quality materials to ensure proper function, and is especially suitable for gas chromatograph applications, ensuring that the septa will not fall into the sample vial during sample injection. The septa are made of PTFE/silicone fusion, are made of TFE/silicone fusion, and have excellent inertness and can be used for multiple injections. The thickness of the septum is 1.5mm.
The screw headspace series bottle caps combine innovation with time-saving convenience, precise manufacturing tolerances, and a controllable manufacturing environment. The bottle cap produced by this patented method truly combines the septum and the cap at the molecular level to avoid excessive evaporation and keep the sample bottle properly sealed.
