We are proud to announce that Restek’s own Jaap de Zeeuw was invited to speak at Separation Science 2012 in Kuala Lumpur, Malaysia. Jaap joined chromatography experts from around the globe in presenting his work (see below for the abstract) entitled Application and Limitation of Using Adsorbents as Stationary Phases in Gas Chromatography for the Separation of Volatile Compounds.
Jaap also built on his decades of bench work and three years of solving analysts’ GC challenges as the “ChromDoctor” for Separation Science by participating in a two-hour GC Troubleshooting Discussion Panel with Hans-Gerd Janssen (Unilever) and Philip Marriott (Monash University). Topics of the panel included extending column life time, faster analysis, and use of hydrogen instead of helium.
Of course, Restek was there with a booth where we featured our latest innovations in GC, LC, and sample preparation. In addition, Jaap presented posters on blood alcohol analysis and optimal column selection using USLC® technology.
Application and Limitation of using Adsorbents as Stationary Phases in Gas Chromatography for the Separation of Volatile Compounds
Jaap de Zeeuw, Restek Corporation
Adsorbents are widely used in many petrochemical applications for several reasons. They have high selectivity for dedicated classes of compounds, which allows for short run times; high retention, which allows for higher analysis temperatures; and extreme stability because the retention is based on adsorption, which makes them very durable. When adsorbents are coated into a capillary column, we speak of PLOT-type columns (Porous Layer Open Tubular). Such adsorption layers are formed by particles that need to be concentric and stabilized. Here is also the challenge, as particles can be swept from the wall and cause blockage. Today’s PLOT columns are highly stabilized and perform well in most hardware configurations. They are chosen often for portable and process-type applications where metal capillaries have also found a new application. Developments have been made on alumina, molecular sieve, as well on porous polymer adsorbents. Practical applications and limitations of using adsorbents in GC will be presented and discussed.