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  1. Chromservis
  2. Chromatography
  3. Hints and tips
  4. Thermal desorption sorbents
  5. Carbotrap X
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Chromatography

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        Carbotrap X

        Parameter Characteristics
        Sorbent strength/type medium/strong carbon black
        Specific surface area approx. 240 m2/g
        Approx. analyte volatility range n-C3/4 to n-C6/7 (BP 50 to 150°C)
        Example analytes light hydrocarbons, 1,3-butadiene, benzene (for 2-week exposure)
        Sorbent maximum temperature > 400°C
        Recommended conditioning temperature 350 to 400°C
        Recommended desorption temperature 350 to 400°C ((but below conditioning temperature where possible)

        Further information

        • hydrofobic
        • minimal inherent artifacts (<0.1 ng)
        • some activitity due to trace metals in the charcoal raw materials used for sorbent production
        • friable - susceptible to fines formation when mechanically shocked. Avoid dropping tubes containing these sorbents
        • compressable - overpacking can result in high impedance and adverseley affect pump sampling flows
        • sorbent maximum temperature must not be exceeded as sorbent will breakdown and vapourise and may contaminate your flowpath
        • 40/60 mesh is the recommended mesh size for sorbent tubes and traps
        • recommended to re-pack tubes after 200 thermal cycles