Chromatography

Analysis of volatile and semi-volatile compounds
High recovery rate with minimum carry over

Thermal desorption is an efficient technique for trace-enrichment and sample introduction of volatile and semi-volatile compounds and it is used in many GC and GCMS applications. Typical applications are the determination of organic pollutants in air, vapors from synthetic materials or fragrance and flavor compounds in food.

The new TD-20 offers high recovery rates and only minimal carry-over, even for relatively high-boiling components, as the tubings that come into contact with the sample are inert and do not contain any cold spots. Sample introduction with electronic gas control (AFC-2010) guarantees best reproducibilty.

Focussing using packed cold traps
During the first desorption stage, the sample components are thermally desorbed from a sample tube. The second stage, used for sample focussing, consists of leading the desorbed components over a cold trap filled with an adsorbent. In this way, very narrow peaks can be achieved. A Peltier element enables electronic cooling, eliminating the need for a cooling agent such as liquid nitrogen. Electronic cooling simplifies operation of the TD-20 and there is no need for continuous checking of coolant levels.

Easy operation
Maintenance of the TD-20 is remarkably simple, and one can exchange specifically the parts which become contaminated over time. For complete automation of the analysis, the TD-20 is equipped with an autosampler that can process up to 48 sample tubes. Control of the TD-20 is performed by the TD-Control software.