Agilent J&W CP-Molsieve 5Å is a molecular-sieve-coated PLOT capillary column especially valuable when separating permanent gases. Analysis times are reduced by up to 75% compared to packed columns. On the CP-Molsieve 5Å, baseline separation of Ar/O2 is achieved at ambient temperatures. The column’s thin-layer dimensions produce fast elution of CO with symmetrical peaks. It is configured for high resolution analysis of permanent gases.