Thermodesorption (TD) is an optimal sample handling technique for gas chromatography. This technique allows volatile and semi-volatile organic substances from various sample matrices to be directly introduced into a GC or GC/MS system. The flexible, highly sensitive, and fully automated TD method is mainly used in environmental analysis, material analysis, food analysis, fragrance and aroma substance analysis, etc. Markes International has set new standards in TD systems with their Series 2 UNITY, ULTRA, Air Server, and CIA 8 products, which meet international standards and enable efficient and accurate analysis of samples from standard tubes, air, or canisters. TD technology offers significant advantages over solvent extraction: higher sensitivity, suitable for solid, liquid, and gas samples, fully automated, and over 95% recovery.
This document introduces the Markes International Series 2 family of Thermal Desorption (TD) systems, including UNITY 2, UNITY Series 2 ULTRA, Air Server, and CIA 8. It highlights that these products set new standards for TD systems by offering efficient and accurate analysis of samples from standard tubes, air, or canisters.
The text details the specific functions of each model, such as quantitative sample recovery (SecureTD-Q), inert valve technology, and compatibility with TubeTAG markers. It also outlines various applications including atmospheric monitoring, material emissions testing, and flavor/aroma profiling. This manual is written in German.
| Sample Recovery Capability | Quantitative sample recovery (SecureTD-Q) |
|---|---|
| Sorbent Trap Temperature | -30° C electrically cooled |
| Tube Capacity (ULTRA) | 10 positions with up to 18 tubes each |
| Compliance Standard | EPA Method TO-15 |
Applications include atmospheric analysis, air monitoring (TO-15/TO-17), industrial exhaust gases, odor measurement, and indoor air quality.
Yes, it is suitable for all methods including strict leak tests without heating or gas flow.
The ULTRA is a multifunctional, mechanically simpler TD sampler with optional electronic TubeTAG reading/writing capabilities.