Cooled Injection System CIS

The CIS can be cooled to temperatures as low as – 180 °C making it uniquely suitable as cryo-trap for VOC analyte concentration in combination, for example, with Thermal Desorption. Additionally, the CIS can be used to concentrate analytes through Large Volume Injection (LVI) with solvent venting. This provides to substantially lower limits of detection. PTV and LVI injections are typically performed using GERSTEL exclusive cryogen-free Universial Peltier Cooling (UPC) or cryostaic cooling.

Depending on the required starting temperature, cryogenic cooling may also be used. At the other end of the temperature scale, the CIS 4 operates up to 450 °C for determination of SVOC, PAHs and some waxes. The high temperature version (CIS 6) scales the heights up to 650 °C, enabling pyrolysis of polymers in suspension following initial evaporation of the solvent. Whichever version the analyst is using, all CIS inlets are based on patented heating and cooling systems and optimized inlet liner dimensions that provide uniform temperature profiles throughout the entire – 180 °C to 650 °C temperature range for controlled evaporation and best possible results.

CIS benefits
  • Multiple cooling options offer optimal adaption to the individual needs.
  • Improved quantitation due to controlled evaporation and discrimination free analyte transfer.
  • Improved limits of detection, improved identification and improved quantitation through sharper peaks.
  • Lower background signal, no septum bleed, improved detection limits thanks to patented Septum-Less Head (SLH).
  • Best possible transfer and recovery of thermally labile analytes due to patented heating system and freely programmable heating rates.
  • Reliable analysis of samples with high matrix load using Automated Liner EXchange (GERSTEL ALEX).


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