Fast on-line measuring system for chemical gas analysis
Photonion has developed a new on-line real-time measuring system for chemical gas analysis based on time-of-flight mass spectrometry (TOF-MS). This technology is now integrated in the VITROCELL® modules in order to analyse the sampling at the spot where the cells are exposed.
Three different ionization techniques are applicable:
SPI and REMPI are considered as soft ionization techniques allowing the acquisition of mass spectra with nearly no fragmentation. A heated transfer line allows direct gas analysis of e. g. engine exhaust, cigarette smoke or e-cigarette vapors.
Gaseous samples are addressed continuously by the Photo-TOF-MS mass spectrometry system at a flow rate of approx. 2mL/min. Depending on the ionization technique various relevant species can be ionized by SPI, REMPI or EI. After the ionization, the formed ions are accelerated into the reflectron time-of-flight mass analyzer where they are separated due to their different mass to charge ratios.
A typical TOF mass spectrum can be generated in some milliseconds.This fast on-line measurement system is a selective and sensitive analytical method to investigate complex gas mixtures such as from combustion processes.
and customized sampling solution for the VITROCELL exposure module.
Universal soft ionization of organic compounds
VUV lamp with 10,78eV (126nm) or Nd:YAG laser with third harmonic generation VUV-cell with 10.5eV (118nm)
Superior selectivity and sensitivity for aromatics (optional)
Fixed frequency (266 or 248nm) or tunable lasers (OPO) in wavelengths range 206nm-300nm
Standard fragmenting ionization technique (optional)
70eV for mass spectra with standard fragmentation (NIST) or tunable from 5eV to 90eV (special setup)
Achieving SPI, REMPI and EI results simultaneously (optional)
The ionization methods (REMPI/EI/SPI) can be operated quasi-simultaneously via multiplexed acquisition methods.
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