ISDP

Internal Standards and Dry Purge

The GERSTEL ISDP and ISDP⁺ can spike each thermal desorption tube with a known, fixed amount of gas or liquid standard; then, each tube is purged with a drying gas to remove water captured in the tube when humid air is sampled or solvent if the tube is spiked with liquids.

ISDP

The GERSTEL ISDP provides precise, reproducible, and fully automated
addition of gaseous internal standards using GERSTEL TD 3.5⁺ tubes and other 3.5” tubes delivered via a high-precision regulator and a fixed volume loop. This addition of gaseous internal standards isoften recommended in methods for air analysis, such as US EPA TO-17. In addition to adding
internal standards, the GERSTEL ISDP also utilizes a mass
flow controller for precise and reproducible dry purging of the tube in the sampling direction to remove water from humid
air samples. The ISDP can spike each tube with a known,
fixed amount of internal standard gas and/or purge each tube with a drying gas to eliminate water captured in the
tube when humid air is sampled.

Main Features and Advantages

  • Intuitive, easy-to-use
  • Mass flow control greatly improves reproducibility compared to needle-valve based approaches
  • Complete software integration
  • Modular design, easy to add capabilities
  • Comprehensive offering of automation options

TD Core System

For analysts that need thermal desorption with accurate results and no downtime, the GERSTEL TD Core System is the most advanced TD available today. Unlike other systems based on outdated 1980s concepts, the GERSTEL TD Core System uses a simple ‘straight through’ design with Dynamic Focusing to determine the broadest range of species with the lowest carryover.

All operations are controlled through MAESTRO software integrated into Agilent GC-MS software. GERSTEL’s reimagining of trapping and focusing analytes means you can run standard TD methods with the highest uptime and lowest total cost of ownership, all while receiving lifetime support.