1. Why measuring the formaldehyde

The HCHO is part of the COV ozone precursors list as a substance listed by the Directive 2002/3/CE and PAMS (US).
It is danfgerous for health, mainly by inhalation and cutaneous contact in indoor ambient air in the professional environnement. It can cause irritations and the corrosion of mucous membranes and can have carcinogenic effects. Toxicological Index: VME: 500 ppb, VLE: 1000 ppb. Some sources of emission: exhaust gas of motor vehicles, binding materials of wood.

2. Chromatotec’s analyser AirmoHCHO

This instrument which detects and quantifies formaldehyde on-line and in continuous as well as other compounds such as acetaldehyde, methanol and acetone, is articulated around the model airmoVOC: 6 ways valve, 3 phase trap, capillary column, methanisation oven and FID detector.

Permeation oven and tube inside instrument all permits to achieve autocalibration. N2 is the carrier gas. -The minimum of detection is from 1 to 2 ppb of HCHO in ambient air (background pollution, background noises). Measurement range is 1 to 100 ppb with good linearity and without interferents.
Data are displayed and stored on hard disk of the integrated computer thanks to the analyser software “Vistachrom”. Two models are available: one with trap (ppb range ), one with loop (ppm range). Results are available on request
Ref: A13000