Leco GC×GC Pegasus BT 4D with Markes Centri sample concentrator

This is the most advanced instrument for the analysis of volatile and semivolatile organic compounds available in our laboratory.

The GC×GC-MS system consists of a Pegasus BT 4D time-of-flight mass spectrometer (Leco) coupled to 8890 gas chromatograph (Agilent).  The gas chromatograph is equipped with Leco's consumable-free thermal modulator needed for GC×GC separations. In practice, the "consumable-free" means that cooling is achieved using cryo liquid, cooled to -80°C  (at work -65 - (-70°)C) instead of the temperature of liquid nitrogen. The mass spectrometer has an EI ion source. Helium or hydrogen can be used for chromatographic separations.  Leco's EI ion source is absolutely compatible with hydrogen and the obtained mass spectra are free of background ions detected for example in Thermo or Agilent mass spectrometers when hydrogen is used as a carrier gas. 

The Leco's GC×GC-MS is coupled with a Centri autosampler (Markes). The Centri AS has options for liquid, static headspace, and SPME (with the cleaning station) injections when used as a conventional CTC autosampler. In addition, Centri is equipped with a thermal desorption option and a cold trap.  The cold trap is a universal trap for a wide range of VOCs. Volatile compounds from liquid or solid samples can be collected once or several times using a headspace syringe or SPME  device and concentrated on the cold trap significantly enhancing the sensitivity of the analysis. Only helium can be used as a carrier gas when using Centri's trapping options.

Available software, - ChromaTOF BT, ChromaTOF Tile.