BTEX Analyzer

VOC Analyzer by Gaseous Chromatography


The VOC72M performs three main functions: the sampling, the GC analysis and the data processing

Supplier: Environment SA


  • Remote diagnosis, made possible without opening the hood
  • 3 levels of built-in security
  • Real-time chromatogram, animated synoptic, auto-diagnostic, control and maintenance data screens can be displayed while the instrument is operating

The sampling is achieved with a single trap filled with a specific sorbent. Its flow through the trap is about 12 ml/min which gives a sampled volume of 165 ml with the standard 15 minute cycle (sampling time >90% of cycle time). Other cycle durations are possible from 10 to 30 minutes. A bypass flow of 35 ml/min maintain a sample input flow when the trap is not sampling.


  • Cycle duration: 10, 12, 15, 20, 30 minutes (programmable)
  • Measuring noise (sigma): ≤0.025μg/m3 at 0.5μg/m3 benzene
  • Carry-over (memory effect): ≤0.5% on the first zero
  • Lack of fit; largest residual: ≤4% of the measured value

Product applications

  • Ambient air monitoring
  • Monitoring of industrial sources emitting VOCs
  • Photochemical pollution studies (stationary and mobile laboratories)