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  1. Chromservis
  2. Chromatography
  3. Stationary phases
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Chromatography

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        More about chromatography

        Rtx-35

        (Crossbond® 35% diphenyl/65% dimethyl polysiloxane)GC column

        • Midpolarity low bleed phase.
        • Equivalent to USP G42 phase.
        • Rtx®-35 columns are available with Integra-Guard™ built-in guard column.

        An Rtx®-35 column is a popular confirmation column for pesticides and herbicides, in conjunction with an Rtx®-5 or Rtx®-1701 column. The higher phenyl content causes useful elution order and retention time changes.

        Applications
        • Organochlorine pesticides
        • PCB congeners or Aroclor mixes
        • Herbicides
        • Pharmaceuticals
        • Sterols
        • Rosin acids
        • Phtalate esters
        Temperature limits
        ID (mm) df(µm) Temperature limits (°C)
        0.18 0.20 40 to 300/320
        0.18 0.40 40 to 290/310
        0.25 0.25 40 to 320
        0.25 0.50 40 to 310
        0.25 1.00 40 to 290
        0.32 0.25 40 to 320
        0.32 0.50 40 to 310
        0.32 1.00 40 to 290
        0.32 1.50 40 to 270/290
        0.32 3.00 40 to 250/270
        0.53 0.25 40 to 260/280
        0.53 0.50 40 to 300
        0.53 1.00 40 to 290
        0.53 1.50 40 to 280
        0.53 3.00 40 to 240/260

        Rtx-35 MS

        (Crossbond® 35% diphenyl/65% dimethyl polysiloxane)GC column

        • Midpolarity phase.
        • Column specifically tested for low bleed performance.
        • Equivalent to USP G42 phase.
        • Rtx®-35 columns are available with Integra-Guard™ built-in guard column.

        An Rtx®-35 column is a popular confirmation column for pesticides and herbicides, in conjunction with an Rtx®-5 or Rtx®-1701 column. The higher phenyl content causes useful elution order and retention time changes.

        Applications
        • Organochlorine pesticides
        • PCB congeners or Aroclor mixes
        • Herbicides
        • Pharmaceuticals
        • Sterols
        • Rosin acids
        • Phtalate esters
        Temperature limits
        ID (mm) df(µm) Temperature limits (°C)
        0.25 0.10 40 to 320/340
        0.25 0.25 40 to 320/340
        0.25 0.50 40 to 310/330
        0.25 1.00 40 to 290/310
        0.32 0.10 40 to 320/340
        0.32 0.25 40 to 320/340
        0.32 0.50 40 to 310/330
        0.32 1.00 40 to 290310
        0.53 0.50 40 to 300/320
        0.53 1.00 40 to 290
        0.53 1.50 40 to 280/300

        Rtx-50

        (Crossbond® 100%methylphenyl polysiloxane)GC column

        • Midpolarity phase.
        • Equivalent to USP G3 phase.

        The high thermal stability of Rtx®-50 columns makes possible dual-column analysis with common phases such as Rtx®-1ms or Rtx®-5ms. Between analyses, high temperatures can be used to drive less volatile contaminants off of the column.

        Applications
        • Organochlorine pesticides
        • Herbicides
        • Rosin acids
        • Sterols
        • Triglycerides
        • Phtalate esters
        Temperature limits
        ID (mm) df(µm) Temperature limits (°C)
        0.18 0.20 40 to 310/330
        0.18 0.40 40 to 300/320
        0.25 0.25 40 to 300/320
        0.25 0.50 40 to 290/310
        0.25 1.00 40 to 280/300
        0.32 0.25 40 to 300/320
        0.32 0.50 40 to 290/310
        0.32 1.00 40 to 280/300
        0.53 0.25 40 to 280/300
        0.53 0.50 40 to 270/290
        0.53 0.83 40 to 270/290
        0.53 1.00 40 to 260/280
        0.53 1.50 40 to 250/270

        Rtx-65

        (Crossbond® 65% diphenyl/35%dimethyl polysiloxane)GC column

        • Mid to high polarity phase.
        • Equivalent to USP G17 phase.

        The Rtx®-65 phase contains the highest phenyl content of any bonded stationary phase available, to improve separation of aromatic compounds through increased phase-analyte interaction. A unique polarity makes these columns ideal for a variety of analyses, from phenols to FAMEs. As a confirmation column for EPA Method 604 phenols, an Rtx®-65 column produces a different elution order, compared to the primary Rtx®-5 column. Rtx®-65 columns elute FAMEs according to equivalent chain length, similar to bonded Carbowax® columns, but the Rtx®-65 phase does not suffer the thermal stability limitations of other polar stationary phases.

        Applications
        • Phenols
        • Fatty acids
        Temperature limits
        ID (mm) df(µm) Temperature limits (°C)
        0.25 0.25 50 to 300
        0.25 0.50 50 to 280/300
        0.25 1.00 50 to 260/280
        0.32 0.25 50 to 300
        0.32 0.50 50 to 280/300
        0.32 1.00 50 to 300
        0.53 0.25 40 to 290/300
        0.53 0.50 40 to 270/290
        0.53 1.00 40 to 250/270

        Rtx-440

        (Proprietary Crossbond® phase)GC column

        • Intermediate polarity phase.
        • Low bleed
        • High-resolution columns with unique selectivity.
        • Ideal for low/trace level analysis.
        Applications
        • Pesticides
        • PAHs
        • Semivolatiles
        Temperature limits
        ID (mm) df(µm) Temperature limits (°C)
        0.18 0.18 20 to 320/340
        0.25 0.25 20 to 320/340
        0.25 0.50 20 to 320/340
        0.32 0.25 20 to 320/340
        0.32 0.50 20 to 320/340
        0.53 0.50 20 to 320/340
        0.53 1.00 20 to 320/340

        Stx-500

        (Crossbond® carborane/dimethyl polysiloxane)GC column

        • Stx™ is used for columns that have been deactivated using Restek´s Siltek® deactivation.
        • Low bleed - ideal for GC/FPD, GC/NPD or GC/MS analyses.
        Applications
        • Brominated flame retardans
        • Coplanar PCB congeners
        • other anates with high boiling temperatures
        Temperature limits
        ID (mm) df(µm) Temperature limits (°C)
        0.25 0.15 -60 to 380°C
        0.53 0.15 -60 to 380°C

        Rxi-17

        Rxi® Capillary GC ColumnsGC column

        These columns have been designed specifically to be the best columns available, for exceptional inertness, ultra-low bleed, and reproducible retention and selectivity. In addition to outstanding performance, this combination of column characteristics assures Rxi® columns will have long lifetimes. The Restek chemists also have developed a stable, reproducible manufacturing process, so that Rxi® columns will meet your needs every time you install a new column.

        Benefits of Rxi® columns
        • Ultra-low bleed
        • Exceptional inertness
        • Reproducible performance, column after column
        Applications
        • Pesticides
        • Herbicides
        • Rosin acids
        • Phthalate esters
        • Triglycerides
        • Sterols
        Temperature limits
        ID (mm) df(µm) Temperature limits (°C)
        0.10 0.10 40 to 280/320
        0.25 0.25 40 to 280/320
        0.25 0.50 40 to 280/320
        0.25 1.00 40 to 280/320
        0.32 0.25 40 to 280/320
        0.32 0.50 40 to 280/320
        0.32 1.00 40 to 280/320
        0.53 0.25 40 to 280/320
        0.53 0.50 40 to 280/320
        0.53 0.83 40 to 280/320
        0.53 1.00 40 to 280/320
        0.53 1.50 40 to 280/320

        Rxi-XLB

        (low-polarity proprietary phase)

        Rxi® Capillary GC ColumnsGC column

        These columns have been designed specifically to be the best columns available, for exceptional inertness, ultra-low bleed, and reproducible retention and selectivity. In addition to outstanding performance, this combination of column characteristics assures Rxi® columns will have long lifetimes. The Restek chemists also have developed a stable, reproducible manufacturing process, so that Rxi® columns will meet your needs every time you install a new column.

        Benefits of Rxi®-XLB columns
        • Ultra-low bleed
        • Exceptional inertness
        • Unique selectivity
        • Reproducible performance, column after column

        Improvements in polymer synthesis and tubing deactivation enable us to make inert, stable Rxi®-XLB columns especially well-suited for analyzing active, high molecular weight compounds with sensitive GC/MS systems, including ion trap detectors. Excellent efficiency, coupled with inertness, low bleed, and high thermal stability, make Rxi®-XLB columns ideal for analyzing semivolatile compounds in drinking water (e.g., US EPA Method 525).

        Applications
        • Pesticides
        • PCB congeners or (e.g.) Aroclor mixes
        • PAHs
        Temperature limits
        ID (mm) df(µm) Temperature limits (°C)
        0.10 0.10 30 to 340/360
        0.18 0.18 30 to 340/360
        0.20 0.33 30 to 340/360
        0.25 0.10 30 to 340/360
        0.25 0.25 30 to 340/360
        0.25 0.50 30 to 340/360
        0.25 1.00 30 to 340/360
        0.32 0.10 30 to 340/360
        0.32 0.25 30 to 340/360
        0.32 0.50 30 to 340/360
        0.32 1.00 30 to 340/360
        0.53 0.50 30 to 320/340
        0.53 1.50 30 to 320/340

        Rxi-5sil MS

        Rxi® Capillary GC ColumnsGC column

        These columns have been designed specifically to be the best columns available, for exceptional inertness, ultra-low bleed, and reproducible retention and selectivity. In addition to outstanding performance, this combination of column characteristics assures Rxi® columns will have long lifetimes. The Restek chemists also have developed a stable, reproducible manufacturing process, so that Rxi® columns will meet your needs every time you install a new column.

        Benefits of Rxi® columns
        • Ultra-low bleed
        • Exceptional inertness
        • Reproducible performance, column after column

        The Rxi®-5Sil MS stationary phase incorporates phenyl groups in the polymer backbone. This improves thermal stability, reduces bleed, and makes the phase less prone to oxidation. Rxi®-5Sil MS columns are ideal for GC/MS applications requiring high sensitivity, including use in ion trap systems.

        Applications
        • Chlorinated hydrocarbons
        • Phthalates
        • Phenols
        • Amines
        • Organochlorine pesticides
        • Organophosphorus pesticides
        • Drugs
        • Solvent impurities
        • Hydrocarbons

        Temperature limits
        ID (mm) df(µm) Temperature limits (°C)
        0.10 0.10 -60 to 330/350
        0.18 0.18 -60 to 330/350
        0.18 0.36 -60 to 330/350
        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 325/350
        0.32 0.25 -60 to 330/350
        0.32 0.50 -60 to 330/350
        0.32 1.00 -60 to 330/350
        0.53 0.25 -60 to 325/350
        0.53 1.50 -60 to 310/330

        Rxi-5 MS

        GC columnRxi® Capillary GC Columns

        These columns have been designed specifically to be the best columns available, for exceptional inertness, ultra-low bleed, and reproducible retention and selectivity. In addition to outstanding performance, this combination of column characteristics assures Rxi® columns will have long lifetimes. The Restek chemists also have developed a stable, reproducible manufacturing process, so that Rxi® columns will meet your needs every time you install a new column.

        Benefits of Rxi® columns
        • Ultra-low bleed
        • Exceptional inertness
        • Reproducible performance, column after column
        Applications
        • Semivolatiles
        • Phenols
        • Amines
        • Residual solvents
        • Drugs of abuse
        • Pesticides
        • PCB congeners or (e.g.) Aroclor mixes
        • Solvent impurities

        Temperature limits
        ID (mm) df(µm) Temperature limits (°C)
        0.10 0.10 -60 to 330/350
        0.18 0.18 -60 to 330/350
        0.18 0.30 -60 to 330/350
        0.18 0.36 -60 to 330/350
        0.20 0.33 -60 to 330/350
        0.25 0.25 -60 to 330/350
        0.25 0.40 -60 to 330/350
        0.25 0.50 -60 to 330/350
        0.25 1.00 -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
        0.53 0.25 -60 to 330/350
        0.53 0.50 -60 to 330/350
        0.53 1.00 -60 to 330/350
        0.53 1.50 -60 to 330/350