GERSTEL TDU

The GERSTEL Thermal Desorption Unit (TDU) was initially developed to be a dedicated instrument for use with GERSTEL Twister stir bars, but it is now used for 5 different sample introduction techniques. The TDU is used with the GERSTEL Cooled Injection System (CIS) on a GC or GC/MS system to enable ultra-trace analysis of a wide range of samples. The TDU mounts directly onto the CIS, eliminating the need for a transfer line. The TDU desorption liner mates directly with the glass inlet liner of the CIS—this novel liner-to-liner design prevents analytes from contacting active sites and thus provides a completely inert sample path. Prior to insertion of the desorption tube into the TDU, GC column head pressure is reduced to zero to prevent back-flush of sample or damage to the column. Transfer into the TDU is performed manually or automatically with the MPS 2 Twister Automation Option.

Main Features and Advantages

• Extremely versatile - 5 sample introduction techniques
  • Automatic Tube Exchange - ATEX
  • Dynamic Headspace - DHS
  • Stir Bar Sorptive Extraction - SBSE - Twister
  • Direct Thermal Desorption
  • Adsorbent Packed Tube Thermal Desorption
• Modular design, easy to add other sample introduction techniques
• Complete software control with Maestro software
• Can be integrated into Agilent Technologies ChemStation
• Electronic pressure control for ease of use and reproducibility
• Valveless operation reduces contamination and downtime
• Short, inert high temperature (350ºC) flow path
• Multiple temperature ramps
• Purges oxygen and water from sample
• True splitless operation
• Small footprint

Options and Accessories

• Gas Sampler – GS1
• Thermal Extractor – TE 1
• Tube Conditioner - TC 2
• Tube Spiking Apparatus – TSA

Applications

Downloads:

TDU Specification Sheet

TDU Brochure