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  1. Chromservis
  2. Chromatography
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Flash and Preparative HPLCGC/MS-TOF
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          Chromatography

          Rt-2330

          (90% biscyanopropyl/10% phenylcyanopropyl polysiloxane - not bonded)GC column

          • Highly polar phase.
          • Equivalent to USP G48 phase.

          Rt™-2330 is one of the most polar capillary column stationary phases. Cyano groups on both sides of the polymer backbone give the phase a strong dipole moment and high selectivity for cis/trans compounds or compounds with conjugated double bonds. Highly polar columns typically exhibit poor column efficiencies, high bleed, and short column lifetimes when thermally cycled. To overcome some of these problems, Restek developed a surface treatment that is more compatible with the Rt™-2330 phase. In addition, improved polymer produces columns with improved column efficiency and lower bleed. Because the Rt™-2330 stationary phase is not bonded, it should not be solvent rinsed.

          Applications
          • cis/trans FAMEs
          • Dioxin isomers
          Temperature limits
          ID (mm) df(µm) Temperature limits (°C)
          0.25 0.10 0 to 260/275
          0.25 0.20 0 to 260/275
          0.32 0.10 0 to 260/275
          0.32 0.20 0 to 260/275
          0.53 0.10 0 to 260/275
          0.53 0.20 0 to 260/275

          Stabilwax-DB

          (Crossbond® Carbowax® polyethylene glycol for amines and basic compounds)GC column

          • Application-specific columns for underivatized amines and other basic compounds.
          • No need for column priming.

          Stabilwax®-DB columns reduce adsorption and improve responses for many basic compounds, without analyte derivatization or column priming. For different selectivity of basic compounds, or higher oven temperatures, use an Rtx®-5 Amine or Rtx®-35 Amine column.Stabilwax®-DB is a bonded stationary phase, but avoid rinsing these columns with water or alcohols.

          Applications
          • Alkylamines
          • Diamines
          • Triamines
          • Nitrogen-containing heterocyclics
          Temperature limits
          ID (mm) df(µm) Temperature limits (°C)
          0.25 0.25 40 to 210/220
          0.25 0.50 40 to 210/220
          0.32 0.25 40 to 210/220
          0.32 0.50 40 to 210/220
          0.32 1.00 40 to 210/220
          0.53 0.50 40 to 210/220
          0.53 1.00 40 to 210/220
          0.53 1.50 40 to 210/220

          Stabilwax

          (Crossbond® Carbowax® polyethylene glycol)GC column

          • Polar phase.
          • Resistant to oxidative damage.
          • Equivalent to USP G14, G15, G16, G20, and G39 phases.

          Our polar-deactivated surface tightly binds the Carbowax® polymer and increases thermal stability, relative to competitive columns. The bonding mechanisms produce a column that can be rejuvenated by solvent washing. Compared to silicone stationary phases, PEG phases are more resistant to damage from strongly acidic or basic volatile compounds.

          Applications
          • FAMEs
          • Flavor compounds
          • Essential oils
          • Solvents
          • Xylene isomers
          • US EPA Method 603 (acrolein/acrylonitrile)
          Temperature limits
          ID (mm) df(µm) Temperature limits (°C)
          0.25 0.10 40 to 250
          0.25 0.25 40 to 250
          0.25 0.50 40 to 250
          0.32 0.10 40 to 250
          0.32 0.25 40 to 250
          0.32 0.50 40 to 250
          0.32 1.00 40 to 240/250
          0.53 0.10 40 to 250
          0.53 0.25 40 to 250
          0.53 0.50 40 to 250
          0.53 1.00 40 to 240/250
          0.53 1.50 40 to 230/240
          0.53 2.00 40 to 220/230

          Rtx-Wax

          (Crossbond® Carbowax® polyethylene glycol)GC column

          • Polar phase.
          • Equivalent to USP G14, G15, G16, G20, and G39 phases.

          Rtx®-Wax columns are the most inert and efficient PEG columns currently available. The extended operating temperature range allows analysis of compounds having a wide volatility range, and ensures low bleed at temperatures as high as 250°C. Selectivity is comparable to other Carbowax® columns, for compounds of intermediate to high polarity. Selectivity data available on request.

          Applications
          • FAMEs
          • Solvents
          • BTEX aromatics
          • Flavour compounds
          • Alcohols
          Temperature limits
          ID (mm) df(µm) Temperature limits (°C)
          0.10 0.10 20 to 250
          0.10 0.20 20 to 240/250
          0.25 0.10 20 to 250
          0.25 0.25 20 to 250
          0.25 0.50 20 to 250
          0.32 0.10 20 to 250
          0.32 0.25 20 to 250
          0.32 0.50 20 to 250
          0.32 1.00 20 to 240/250
          0.53 0.25 20 to 250
          0.53 0.50 20 to 250
          0.53 1.00 20 to 240/250

          Rtx-200 MS

          (Crossbond® trifluoropropylmethyl polysiloxane)GC column

          • Midpolarity phase.
          • Column specifically tested for low bleed performance.
          • Equivalent to USP G6 phase.

          Rtx®-200 columns have accomplished many difficult separations not possible on any other bonded stationary phase. Many analysts consider these the best, most inert midpolarity columns available. The trifluoropropyl stationary phase has a unique selectivity that changes elution orders and resolves compounds that phenyl, cyano, or Carbowax® phases can not. The Rtx®-200 column offers exceptional thermal stability, low bleed, and superior inertness--even for active compounds such as phenols, and with sensitive detectors such as ECDs, NPDs, and MSDs.

          Applications
          • Solvents
          • Freon® fluorocarbons
          • Alcohols
          • Ketones
          • Silanes
          • Glycols
          • Excellent confirmation column, with an Rtx®-5 column, for phenols, nitrosamines, organochlorine pesticides, chlorinated hydrocarbons, and chlorophenoxy herbicides.
          Temperature limits
          ID (mm) df(µm) Temperature limits (°C)
          0.25 0.10 -20 to 320/340
          0.25 0.25 -20 to 320/340
          0.25 0.50 -20 to 310/330
          0.25 1.00 -20 to 310/330
          0.32 0.10 -20 to 320/340
          0.32 0.25 -20 to 320/340
          0.32 0.50 -20 to 310/330
          0.32 1.00 -20 to 290/310
          0.53 0.50 -20 to 300/320
          0.53 1.00 -20 to 290/310
          0.53 1.50 -20 to 280/300

          Rtx-200

          (Crossbond® trifluoropropylmethyl polysiloxane)GC column

          • Midpolarity phase.
          • Equivalent to USP G6 phase.

          Rtx®-200 columns have accomplished many difficult separations not possible on any other bonded stationary phase. Many analysts consider these the best, most inert midpolarity columns available. The trifluoropropyl stationary phase has a unique selectivity that changes elution orders and resolves compounds that phenyl, cyano, or Carbowax® phases can not. The Rtx®-200 column offers exceptional thermal stability, low bleed, and superior inertness - even for active compounds such as phenols, and with sensitive detectors such as ECDs, NPDs, and MSDs.

          Applications
          • Solvents
          • Freon® fluorocarbons
          • Alcohols
          • Ketones
          • Silanes
          • Glycols
          • Excellent confirmation column, with an Rtx®-5 column, for phenols, nitrosamines, organochlorine pesticides, chlorinated hydrocarbons, and chlorophenoxy herbicides.
          Temperature limits
          ID (mm) df(µm) Temperature limits (°C)
          0.18 0.20 -20 to 310/330
          0.18 0.40 -20 to 310/330
          0.25 0.10 -20 to 320/340
          0.25 0.25 -20 to 320/340
          0.25 0.50 -20 to 310/330
          0.25 1.00 -20 to 310/330
          0.32 0.10 -20 to 320/340
          0.32 0.25 -20 to 320/340
          0.32 0.50 -20 to 310/330
          0.32 1.00 -20 to 290/310
          0.32 1.50 -20 to 280/300
          0.53 0.10 -20 to 310/330
          0.53 0.25 -20 to 310/330
          0.53 0.50 -20 to 300/320
          0.53 1.00 -20 to 290/310
          0.53 1.50 -20 to 280/300
          0.53 3.00 -20 to 260/280

          Rtx-1701

          (Crossbond® 14%cyanopropylphenyl/86%dimethyl polysiloxane)GC column

          • Midpolarity phase.
          • Equivalent to USP G46 phase.

          Rtx®-1701 is one of the most popular stationary phases used in capillary GC. The mix of cyano and phenyl functional groups increases the polarity and offers a different elution order relative to less polar Rtx®-1 or Rtx®-5 columns. An Rtx®-1701 column is ideal for confirmation analysis, in combination with an Rtx®-35 or Rtx®-5 column. The polymer is fully characterized to ensure long-term reproducibility, column-to-column consistency, and low bleed, even with sensitive detectors such as ECDs and MSDs.

          Applications
          • Alcohols
          • Oxygenates
          • PCB congeners or (e.g.) Aroclor mixes
          • Pesticides
          Temperature limits
          ID (mm) df(µm) Temperature limits (°C)
          0.10 0.10 -20 to 280
          0.18 0.20 -20 to 280
          0.18 0.40 -20 to 270/280
          0.25 0.10 -20 to 280
          0.25 0.25 -20 to 280
          0.25 0.50 -20 to 270/280
          0.25 1.00 -20 to 260/280
          0.32 0.10 -20 to 280
          0.32 0.25 -20 to 280
          0.32 0.50 -20 to 270/280
          0.32 1.00 -20 to 260/280
          0.32 1.50 -20 to 240/260
          0.53 0.10 -20 to 270/280
          0.53 0.25 -20 to 270/280
          0.53 0.50 -20 to 260/270
          0.53 1.00 -20 to 250/270
          0.53 1.50 -20 to 240/260
          0.53 3.00 -20 to 230/250

          Rtx-624

          (Crossbond® 6% cyanopropylphenyl/94% dimethyl polysiloxane)GC column

          • Low to midpolarity phase.
          • Equivalent to USP G43 phase.
          Applications
          • Volatiles organic pollutants
          Temperature limits
          ID (mm) df(µm) Temperature limits (°C)
          0.18 1.00 -20 to 240
          0.25 1.40 -20 to 240
          0.32 1.80 -20 to 240
          0.45 2.55 -20 to 240
          0.53 3.00 -20 to 240

          Rtx-1301

          (Crossbond® 6% cyanopropylphenyl/94% dimethyl polysiloxane )GC column

          • Low to midpolarity phase.
          • Equivalent to USP G43 phase.

          Many analysts feel the Rtx®-1301 column has the best cyanosilicone bonded stationary phase available, with no other column manufacturer providing lower bleed, longer lifetime, or better inertness. The polymer is fully characterized to ensure long-term reproducibility, column-to-column consistency, and low bleed--even with sensitive detectors such as ECDs and MSDs.

          Applications
          • Residual solvents
          • Oxygenates
          • Alcohols
          • Volatile organic compounds
          Temperature limits
          ID (mm) df(µm) Temperature limits (°C)
          0.25 0.25 -20 to 280
          0.25 0.50 -20 to 270
          0.25 1.00 -20 to 260
          0.25 1.40 -20 to 240
          0.32 0.25 -20 to 280
          0.32 0.50 -20 to 270
          0.32 1.00 -20 to 260
          0.32 1.50 -20 to 250
          0.53 0.25 -20 to 280
          0.53 0.50 -20 to 270
          0.53 1.00 -20 to 260
          0.53 1.50 -20 to 250
          0.53 3.00 -20 to 240

          Rtx-5

          (Crossbond® 5% diphenyl/95% dimethyl polysiloxane)GC column

          • Low polarity phase.
          • Equivalent to USP G27, G36 phases.

          The 5% diphenyl/95% dimethyl polysiloxane stationary phase is the most popular GC stationary phase and is used in a wide variety of applications. All residual catalysts and low molecular weight fragments are removed from the Rtx®-5 polymer, providing a tight mono-modal distribution and extremely low bleed.

          Application
          • Drugs
          • Solvent impurities
          • Pesticides
          • Hydrocarbons
          • PCB congeners or (e.g.) Aroclor mixes
          • Essential oils
          • Semivolatiles
          Temperature limits
          ID (mm) df(µm) Temperature limits (°C)
          0.10 0.10 -60 to 330/350
          0.10 0.40 -60 to 320/340
          0.18 0.20 -60 to 330/350
          0.18 0.40 -60 to 315/330
          0.25 0.10 -60 to 330/350
          0.25 0.25 -60 to 330/350
          0.25 0.50 -60 to 330/350
          0.25 1.00 -60 to 320/340
          0.32 0.10 -60 to 330/350
          0.32 0.25 -60 to 330/350
          0.32 0.50 -60 to 330/350
          0.32 1.00 -60 to 330/350
          0.32 1.50 -60 to 310/330
          0.32 3.00 -60 to 280/300
          0.32 5.00 -60 to 260/280
          0.53 0.10 -60 to 320/340
          0.53 0.25 -60 to 320/340
          0.53 0.50 -60 to 310/330
          0.53 1.00 -60 to 310/330
          0.53 1.50 -60 to 310/330
          0.53 3.00 -60 to 270/290
          0.53 5.00 -60 to 270/290

          Maximum temperatures listed are for 15- and 30-meter lengths. Longer lengths may have a slightly reduced maximum temperature.