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Capillary for Gas Chromatography Columns

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Gas Chromatography

CM Scientific are European distributors for Polymicro Technologies LLC. Polymicro Technologies are specialists in the manufacture of internally Uncoated Flexible Fused Silica Capillary for use in Gas Chromatography Columns, and provide a complete range of high quality standard and speciality products which we are delighted to be able to supply to our European clients.

Polymicro Capillary Reels

To browse through the range of capillary for use in GC columns that we have available please click through to our online store.

Capillary Tubing in the Gas Chromatography Industry

Polymicro's Gas Chromatography (GC) capillary are used by many of the world's leading OEM's in their Gas Chromatography products.

Although capillary tubing is now used over a broad range of applications, its history is inseparable from that of Gas Chromatography. According to the International Union of Pure and Applied Chemistry (IUPAC), "Chromatography is a physical method of separation in which the components to be separated are distributed between two phases, one of which is stationary (stationary phase) while the other (the mobile phase) moves in a definite direction".[1] In Gas Chromatography (GC), the mobile phase is a gas and the stationary phase is either a solid or a liquid, depending on the type of separation column selected. The actual separation of components in a mixture is achieved due to the differential distribution of solutes between the mobile and stationary phases. Capillary is fundamental to the technique, as it is the support for the stationary phase and the conduit through which the mobile phase travels.

One of the first applications for capillary tubing was in the Gas Chromatography industry. Dandeneau and Zerenner's pioneering efforts are recognized by many as the cornerstone for the introduction of fused silica based capillary as a support for GC columns.[2] Continued improvements in GC analysis have been aided by the unique properties of synthetic fused capillary tubing, with the majority of new methods rooted in proprietary new stationary phase coatings. Since its first use in the late 70's, the range of capillary tubing internal diameters (ID) has grown, and specification tolerances have continually tightened to meet the exacting demands of the column manufacturing industry. Numerous GC column manufacturers offer a broad selection of columns used in the analysis of food products, pharmaceuticals, clinical samples, petroleum, and a variety of other applications.

GC Capillary Column Products from Polymicro

Polymicro produces a wide range of GC capillary column products designed specifically for GC applications. Polymicro's standard fused silica capillary range includes polyimide and UV transparent coatings. Capillary with ID's ranging from 50mm up to 750mm are routinely used, with the majority of GC columns employing capillary between 180mm and 530mm.

Two product lines are commonly used, these being the standard TSP and high temperature TSG. Although Polymicro communicates the specifications in micrometers, most GC column manufacturers list column diameters in millimeters. It is common to name a column by a combination of the ID and stationary phase.

Alternative buffer coatings and custom sizes are available - so if you can't find what you are looking for on our online store please contact us to discuss your specific requirements.

How to Purchase Gas Chromatography Capillary

Please feel free to browse our online store for full product details. Once you have decided which capillary product is right for you then you have a choice of which format you would like to purchase it in. Available formats include:

Bulk: The majority of capillary for a GC Column is supplied to the market in long, continuous lengths on polystyrene reels. Reel length is dependent on customer requirements but is generally 10-100m.

Pre-cut: Capillary is often pre-cut to customer specified dimensions. Different quality of end finishes are available.

References:

[1] McNair, H. M., Miller, J. M., Basic Gas Chromatography, Chapter 1, John Wiley & Sons, Inc. New York, (1997) [2] Dandeneau, R. D., Zerenner, E. H., HRC&CC 2(6), (1979) 351-356. Gas Chromatography information supplied by Polymicro Technologies LLC.