EmailThe Enrichment Desorber is a pretreatment device for gas chromatography analyzers. It is a fully automated, direct-feed, single-channel cold trap enrichment and thermal desorber that uses a combination of six-way valves and solenoid valves in the gas line design, and Tenax or activated charcoal adsorbent tubes as the enrichment and thermal desorption tubes to enrich trace volatile organic compounds (VOCs) in the ambient air, thus lowering detection limits of chromatography analyzers.
Features
The cold trap adopts Stirling cooling at -120°C, which meets the demand of low-temperature enrichment;
Simple operation, easy use, automatic process realized by software control of the whole process Can set periodic sampling with heating throughout to realize low sample residues, good precision and high accuracy
Adopt direct sampling for water removal, enrichment and analysis, with no need of disassembling the adsorption tube;
Automatic blowback in the gas path improves the accuracy of the next measurement and avoids cross contamination;
Strong versatility: can be used with most gas chromatography and mass spectrometry products.
Specifications
| title | val |
| Effective enrichment times | 50 ~160 times |
| Cold trap heating speed | ≥40°C/s |
| Desorption time | 1 ~ 99.9 min; control accuracy is 0.1 min; |
| Sampling flow rate | 0 ~ 50mL/min (adjustable) |
| Purge cleaning flow | 0 ~ 200mL / min (adjustable) |
| Resolution recovery | ≥95% (benzene) |
| Qualitative repeatability | RSD ≤3.0% |
| Quantitative repeatability | benzene, total hydrocarbons RSD ≤ 2.0%, other RSD ≤ 5.0%. Range/zero point drift: ≤3.0% (1d) |
| Temperature stability | ± 1°C |
| Measurement cycle | 30~60min (adjustable) |
| Sampling control mode | MFC electronic flow control |
