PLOT Capillary GC Columns

We offer a wide variety of Porous Layer Open Tubular (PLOT) GC columns, including those made with our specialty carbon adsorbents. A proprietary procedure is used to fix adsorbent particles to the inside of fused silica tubing, and ensures they will not be dislodged in normal use. PLOT GC columns are commonly used for separations of small molecules, such as permanent gases, light hydrocarbons, and volatile sulfur compounds. Choose:
  • Carboxen 1010 PLOT for separations of hydrogen, oxygen, nitrogen, carbon monoxide, methane, carbon dioxide, and C2/C3 hydrocarbons. This is the only column that can separate all these permanent gases.
  • Carboxen 1006 PLOT for most permanent gases and C1-C3, using above ambient initial temperatures. Also for resolving formaldehyde/water/methanol (formalin) mixtures and monitoring impurities in ethylene.
  • Supel-Q PLOT for analyses of sulfur gases, alcohols, ketones, aldehydes, and many polar compounds. Also for carbon dioxide and C1-C4 hydrocarbons at above ambient temperatures, and for gasoline and other petroleum fractions.
  • Alumina sulfate PLOT for C1-C4 hydrocarbons, specifically methane from the C2 hydrocarbons, with reduced peak tailing. Also for elution of acetylene after n-butane, and the elution of methyl acetylene after n-pentane and 1,3-butadiene.
  • Alumina KCl PLOT for C1-C4 hydrocarbons. Also for excellent separation of many common fluorocarbon compounds.
  • Silica PLOT for C1-C4 hydrocarbons (even in the presence of moisture), fluorocarbons, sulfur gases, and carbon dioxide.
  • Mol Sieve 5A PLOT for oxygen, nitrogen, carbon monoxide, and methane in less than 5 minutes. For more difficult separations, such as argon from oxygen, by using subambient temperatures (15 °C or below).