Gas Chromatography Columns, GC Columns, Fused Silica Capillary Columns, Mumbai, India
 
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Gas Chromatography Columns (GC Columns)

 

FUSED SILICA CAPILLARY COLUMNS

 
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.
 

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
 
 

ULTRA ALLOYTM STAINLESS STEEL CAPILLARY COLUMNS

  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
 

GC CONSUMABLES

 
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.
 
 
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.
 
 
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.
 
 
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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