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

        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.

        Rtx-1

        (Crossbond® 100% dimethyl polysiloxane)GC column

        • Nonpolar phase.
        • Equivavelnt to USP G1.G2,G38 phases.

        Rtx®-1 columns exhibit long lifetime and very low bleed at high operating temperatures. A proprietary synthesis process eliminates residual catalysts that could cause degradation and increase bleed.

        Applications
        • Solvent impurities
        • PCB congeners or (e.g.) Aroclor mixes
        • Simulated distillation
        • Drugs of abuse
        • Gases
        • Natural gas odorants, sulfur compounds
        • Essential oils
        • Hydrocarbons
        • Semivolatiles
        • Pesticides
        • Oxygenates

        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 320/340
        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 320/340
        0.32 1.50 -60 to 310/330
        0.32 3.00 -60 to 280/300
        0.32 4.00 -60 to 280/300
        0.32 5.00 -60 to 260/280
        0.45 2.55 -60 to 270/290
        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
        0.53 7.00 -60 to 240/260

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

        Rtx-20

        (Crossbond® 20% diphenyl/80% dimethyl polysiloxane)GC column

        • Low to midpolarity low bleed phase.
        • Equivalent to USP G28, G32 phases.
        • Rtx®-20 columns are available with Integra-Guard™ built-in guard column.
        Applications
        • Volatile and flavor compounds
        • Alcoholic beverages
        Temperature limits
        ID (mm) df(µm) Temperature limits (°C)
        0.25 0.25 -20 to 300/320
        0.25 0.50 -20 to 290/310
        0.25 1.00 -20 to 280/300
        0.32 0.25 -20 to 300/320
        0.32 0.50 -20 to 290/310
        0.32 1.00 -20 to 280/300
        0.32 1.50 -20 to 270/290
        0.32 3.00 -20 to 250/270
        0.53 0.25 -20 to 260/280
        0.53 0.50 -20 to 260/280
        0.53 1.00 -20 to 260/280
        0.53 3.00 -20 to 240/260

        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