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CM Scientific is a European distributor for Polymicro Technologies LLC based in Phoenix, Arizona, USA.
Polymicro Technologies are specialist in the manufacture of Flexible Fused Silica Capillary, providing a complete range of high quality standard and speciality products. As the world leader in fused silica capillary for the Gas Chromatography (GC), Liquid Chromatography (LC) and Capillary Electrophesis (CE) markets, Polymicro's capillary products are used by many of the world's leading OEM's in their chromatography products.
For full details of the Polymicro Technologies LLC product range and capabilities please visit their web site.
Applications
Flexible fused silica capillary is used for a wide range of chromatography columns in Analytical Chemistry applications including Gas Chromatography (GC), Capillary Electrophoresis (CE) and Capillary Liquid Chromatography (CLC or LC).
Fused silica capillary is used as the base material for producing capillary columns such as GC columns and LC columns. Since its introduction in the early 1980’s fused silica capillary has been become the standard column material for nearly all GC column, LC column and CE column manufacturers.
A large standard range of sizes are available from 2µm to 700µm internal diameters. Additional ranges including square bore and thick wall flexible fused silica capillary are also available. Buy online now!
Gas Chromatography
Although flexible fused silica capillary tubing is now used over a broad range of applications, one of the first applications for capillary tubing was in the Gas Chromatography (GC) industry. The growth in the use of gas chromatography can be traced back to the development of fused silica capillary as the basis for nearly all GC Columns. 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 GC 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.
Polymicro produces a wide range of capillary designed specifically for GC applications. Capillary with ID’s ranging from 50µm up to 750µm are routinely used, with the majority of GC columns employing capillary between 180µm and 530µm. Two product lines are commonly used, these being the standard TSP and high temperature TSG. Buy online now!
Capillary Electrophesis
Capillary Electrophesis (CE) is a separation method based on the differential migration rates of sample components within a capillary when an electrical field is applied to the capillary. Key features that make fused silica capillary tubing the CE column material of choice in include:
- The polyimide coating can be easily removed in a process called “windowing”. Windowed capillary has high transmission in the UV-Vis spectral region, allowing for direct on-column absorbance measurements.
- CE Capillary can be easily rinsed and filled with solutions and buffers by either positive pressure or vacuum.
- The durability and abrasion resistance of polyimide coated capillary allow for great flexibility in instrumental design and hyphenation interfacing.
- Capillary can be easily cleaved to length, providing users great latitude in adjusting CE column length and economies of scale in tubing procurement.
Polymicro set the standard in outside diameters (OD) by introduction of the 375µm and 150µm TSP product lines, and offers capillary for CE in a variety of formats including: bulk capillary on spools, capillary cut to prescribed lengths, windowed capillary, capillary assemblies, and custom capillary arrays. A number of CE manufacturers turn to Polymicro for custom sizes to meet their specific instrumental design, and rely on Polymicro’s expertise for design and development assistance. Buy online now!
Liquid Chromatography
Chromatographic techniques that employ a liquid mobile phase loosely fall into a category referred to as Liquid Chromatography (LC). Capillary fills two fundamental roles in LC applications, as connection lines and as LC columns. First, it is often used for making fluidic connections between the liquid chromatography columns and the other components of the system, i.e. flow cells, injectors, detectors, etc. Capillary is durable, yet easily cut to the exact length needed for such interfacing. The wide range of available ID’s allows chromatographers great latitude in selecting tubing that offers the optimum performance under their experimental and instrumental design. Second, trends toward miniaturization of systems has lead to the introduction of capillary-based columns, and thus the advent of Capillary Liquid Chromatography (CapLC).
LC Capillary diameters most commonly range from 50µm up to 500µm, with a variety of different designs available. Standard TSP products are commonly used with TSU products gaining interest for some monolithic columns. Buy online now!
Products
Polymicro's standard fused silica tubing range includes polyimide and UV transparent coatings, alternative buffer coatings and custom sizes are available - please contact us to discuss your requirements.
Capillary can be purchased in a variety of formats, including:
Bulk: The majority of capillary is supplied to the market in long, continuous lengths on polystyrene reels. Reel length is dependent on customer requirements but is generally 10-100m. Buy online now!
Pre-cut: Capillary is often pre-cut to customer specified dimensions. Different quality of end finishes are available.
Windowed Capillaries: CM Scientific also supplies precision windowed capillary tubing. Parts are supplied with the polyimide coating removed over a defined length at a specified distance from one end of the capillary section. This provides an optical quality window that has excellent mechanical properties as well.