ValcoPLOT Molesieve 5&angst, PLOT columns offer greatly enhanced analytical efficiency at economical prices. No need for cryogenic equipment to analyze Ar/O2 with our thick film columns. ValcoPLOT Molesieve 5&angst, PLOT thin film columns offer fast elution of carbon monoxide with near perfect peak symmetry. Our proprietary bonding technology ensures that the particles stay put even when used with valves.