Surveillance of VOCs in water – BTEX included

Model: airTOXIC WMS

Manufacturer: Chromatotec

In compliance with US EPA 502-2 method in air, water or soil


  • airTOXIC Purge for VOCs in Water and Air in option


The airTOXIC PURGE uses a valve with a sample trap. It also features a metallic capillary column.

  • Miniaturization, sensitivity, mobility and flexibility are its main features.
  • Everything from the sample port up to the data storage is integrated in a wall mounted polyester cabinet (stainless steel in option).
  • Uninterrupted sampling with pre-concentration on 1 absorbent tube
  • Gas chromatograph with metallic column with programmable temperature gradient oven.

Electronic pressure measurement of the carrier gas.

  • One week tested after production for quality control.

Vistachrom software enables the user to visualize and store data on the embedded industrial computer.

Furthermore it provides comfortable utilities to recalculate, calibrate and export data and to set-up measurement.

The software allows the calculation of retention time, area, mass or concentration profiles.

Automatic calibration and validation of the data with internal airmoCAL MFC. Possibility to check linearity with multipoint cylinder dilution system controlled by Vistachrom software.

NITROXYCHROM included in standard

Purge for on line analytic instrument

  • In compliance with US EPA 502.2 Method
  • 5 ml of water sample as standard or optional 25 ml sparger
  • Purge with inert gas: ultra pure N2 (Ultra High Purity) – 40 ml/min from NITROXYCHROM (N2 generator) included
  • Sampling time: 11 minutes
  • Dead volume < 15 mL (volume between water and trap)
  • Bubbles with a diameter < 3 mm at the origin of the frit Automatic rinse (twice as standard)
  • Up to 40 compounds analysed by airTOXIC Purge in standard. More compounds with FID, ELCD or MSD


  • Capability to analyze VOCs in water and in air with the same system auomatically. Switch from water to air is controlled by Vistachrom software.
  • 24 V power: for transportable analysis
  • Multiple streams selector (2 to 6 streams with one analyzer)
  • Calculation Module (Average)
  • Explosion proof Exp box – ATEX or CSA on request
  • Automatic calc cleaning (ultrasonic or chemical)
Analysis by airTOXIC Purge
  • Up to 40 compounds
  • BTEX and chlorine compounds
Detection limits

Detection range (adjustable depending on application)

  • Benzene : 1 ng/liter in water or 10 ppt in air
  • 0.5 to 20 µg/l for surface water and finished water
Purge method
  • ZERO N2 analysis
  • ZERO WATER analysis
  • Standard water analysis Ambient air analysis in option
Relative Standard Deviation
  • RSD < 3 % on concentration over 48H
  • RSD < 0.3% on retention time over 48H
  • < 10% for water analysis on concentration
Cycle time
  • From 15 to 60 minutes depending on application
  • Embeded computer Windows based with LCD display 128 GB of Hardware storage on SSD memory
Linearity R²> 0.99
  • MODBUS protocol included in standard 4-20mA (optional)
Gas supply
  • Carrier gas : N2 (3 bar) 4ml/min
  • CALIB: in continuous 50 ml / min.
  • CALIB during validation ~ 450ml/min
  • Sample dryer: 200 ml/min
  • Detector cleaning : 3ml/min Pneumatic valve 90ml/commutation
Power supply
  • Main: 230V 60Hz or 115V / 50Hz
  • Power: 24V (optional)
Rack characteristics
  • Height: 800 mm
  • Width: 600 mm
  • Depth: 300 mm
  • Net weight: 40 Kg

Measurement of temperature and pressure in the box



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