Thermal desorption releases suitable organic compounds from sorbent media and transfers them to a GC system for TD-GC-MS analysis. Selection depends on analytes, sample matrix, humidity, throughput and sampling mode. A portable sampling pump collects air onto a TD tube; a tube conditioner prepares suitable tubes for use.
Systems and technical specifications
| Model or device | Technical overview |
|---|---|
| CDS 9300 | Single-tube thermal desorber; standard Vocarb focusing trap; valve oven and transfer line up to 350 °C; sample and trap desorption up to 400 °C; 17 kg. |
| CDS 9305 | Single-tube system with built-in mass flow controller for near-real-time sampling; heated GC transfer line; 19 kg. |
| CDS 9350 | Dual-tube system for continuous air monitoring; low-thermal-mass Vocarb focusing trap; sample and trap desorption up to 400 °C; 21 kg. |
| CDS 7550 | 72-position thermal desorption autosampler; requires a compatible concentrator (manufacturer specifies CDS 7000E); sample desorption up to 400 °C; 23 kg. |
| CDS 7550S | Stand-alone 72-position system with built-in Vocarb focusing trap; optional Peltier cooling to −20 °C; valve oven up to 300 °C and transfer line up to 350 °C; 23 kg. |
| CDS 7550S Pro | Stand-alone 72-position system; Peltier cooling to −20 °C; automated internal standard addition, pre-trap split and sample saver; sample and trap desorption up to 400 °C; 23 kg. |
| Single-channel air sampler | Battery operated; manufacturer-rated runtime 20 hours at 300 mL/min; low-flow mode 0–99 mL/min, high-flow mode 100–600 mL/min; flow accuracy ±5%; 540 g. |
| Tube conditioners | Single- or six-tube versions; maximum 400 °C; for 6 mm × 4.5 in and 1/4 in × 3.5 in tubes; other sizes require suitable adapters. |
Standard equipment and options differ between models. In particular, the 7550 requires a concentrator, while the 7550S and 7550S Pro have an integrated focusing trap. Tube dimensions and sorbents must be matched to the selected configuration.
Manufacturer information
CDS 9300 · CDS 9305 · CDS 9350 · CDS 7550S · CDS 7550S Pro
