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FUSED SILICA CAPILLARY COLUMNS |
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Quadrex fused silica columns are produced with the industry standard polyimide outer coating (390°C maximum temperature) for most general GC applications. Columns with high temperature polyimide coatings, for applications >400°C, are available upon request.
Each stationary phase used in our coating processes is synthesized and cleaned in-house to insure column to column reproducibility. All Quadrex phases are bonded to the silica substrate and cross-linked. Our stringent QA / QC program governs the production of all in-house phases which results in accurate selectivity, reproducibility, and outstanding thermal stability. |
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PHASE DESIGNATION |
CHEMICAL COMPOSITION |
GENERAL AREA OF USE |
| NON-POLAR |
| 007-1 |
Dimethylpolysiloxane |
boiling point column, general purpose: hydrocarbons, solvents, waxes, pharmaceuticals, flavors, etc. |
007-5 |
(5% Phenyl) Methylpolysiloxane |
boiling point column, general purpose: aromatics, hydrocarbons, solvents, waxes, pharmaceuticals, flavors, etc. |
007-5MS |
SilphenylenePolysiloxane |
boiling point column, low bleed characteristics for GC/MS use: hydrocarbons, solvents, waxes, etc., |
| SLIGHTLY POLAR |
007-10
007-20 |
(10% & 20% Phenyl)
Methylpolysiloxanes |
volatiles |
007-502
007-608
007-624 |
CyanopropylphenylMethylpolysiloxanes |
EPA Method applications: volatiles and semi-volatiles in drinking water, ground water, pesticides, herbicides, etc. |
| 007-1301 |
(6% Cyanopropylphenyl)
Methylpolysiloxane |
PCB's, pesticides, herbicides |
| MID-POLARITY |
| 007-35 |
(35% Phenyl)
Methylpolysiloxane |
PCB's, pesticides, herbicides, amines |
| 007-1701 |
(14% Cyanopropylphenyl)
Methylpolysiloxane |
PCB's, pesticides, alcohols, pharmaceuticals |
| 007-17 |
(50% Phenyl)
Methylpolysiloxane |
pesticides, phenols, pharmaceuticals, FAMEs. etc |
| 007-65HT |
(65% Phenyl)
Methylpolysiloxane |
triglycerides, biodiesel |
| POLAR |
| 007-225 |
(50% Cyanopropylphenyl)
Methylpolysiloxane |
carbohydrates, alditol acetates, FAMEs |
007-CW
BTR-CW |
Polyethylene Glycol (PEG) |
alcohols, free acids, essential oils, solvents, aromatics, BTEX, flavors and fragrances |
| 007-FFAP |
Nitroterephthalic acid-modified Polyethylene Glycol (PEG) |
alcohols, aldehydes, ketones, acids |
| 007-23 |
(78% Cyanopropyl)
Methylpolysiloxane |
cis and trans FAME isomers, dioxin analyses |
| PLOT (Porous Layer Open Tubular) |
PLT-5A
PLT-Q
PLT-AL2O3 |
Molecular Sieve 5A |
permanent gases |
| Porous Divinylbenzene polymer |
light hydrocarbons, gases |
| Alumina/KCL |
light hydrocarbons |
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ULTRA ALLOYTM STAINLESS STEEL CAPILLARY COLUMNS |
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The inertness of Ultra ALLOY™ stainless steel columns matches that of fused silica and is derived from a patented, multi-step manufacturing process which utilizes a five-layered pre-treatment of the inner surface of the stainless steel.
• High temperature stability
• Highly inert deactivated inner surface
• Exceptional mechanical durability-cannot break!
• Perfect for field use or high vibration situations
• Can be tightly coiled (3 inches) for portable GCs
• Ideal for use in small, field portable GCs |
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GC CONSUMABLES |
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GRAPHITE AND GRAPHITE/TL-POLYIMIDE™ FERRULES*
Quadrex offers a complete range of graphite, graphite/TL-Polyimide™, and graphite-Vespel™ ferrules for capillary column installation which offer a reliable gas tight seal and are specifically designed for use in your GC. Standard 1/16" ferrules are available for the most popular GCs such as HP-5890 and 6890s, Varian, Perkin Elmer, Shimadzu, Finnegan and others. Ferrules for 1/8" fittings and reducing ferrules (1/8" to 1/16") and two-holed ferrules are also available. |
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INJECTOR PORT LINERS
All injection port liners are polysiloxane deactivated and ready for use (other deactivation available, inquiry for details). They are manufactured to exacting tolerances and come in various configurations for many popular GCs. Guaranteed inert for phenols, organic acids and bases. |
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SEPTA
Advances in GC techniques can lead to higher injection port temperatures. At elevated temperatures, septa can stick to the injection port hardware or harden causing leaks which can lead to poor reproducibility. Septa coring is also a problem which results in debris entering the injector liner and possibly even the capillary column itself. Today's septa technology provides outstanding mechanical properties for repeated manual or autosampler injections, and chemical properties which give ideal low bleed characteristics for elevated temperature use. |
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CARRIER GAS TRAPS AND FILTERS
Today's GC column systems rely on the highest purity carrier gases in order to avoid interference's with the chromatography. To achieve this it is important to filter out any contaminants that may be present in your compressed gas sources. Individual gas purifiers are available to filter the contaminants commonly found in compressed gas cylinders. All of the following gas purifiers are produced using the finest grade of adsorbent media. The housings are constructed with strength, durability and simplicity of design in mind. All traps and filters are supplied with nickel plated end fittings in either 1/8" or 1/4" sizes. |
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