The UMEx 100 Passive Sampler for formaldehyde was developed in collaboration with the National Institute of Working Life in Umea, Sweden. Constructed of tough polypropylene, the UMEx 100 contains a tape impregnated with 2,4-dinitrophenylhydrazine (DNPH) for reliable collection of formaldehyde.
Sampling Rate for Formaldehyde
28.6 ml/min with a RSD of 18% (for 15-min to 8-hrs or 24-hrs
20.4 ml/min (7 days)
See the Passive Sampling Guide for UMEx 100 sampling rates for other aldehydes.
Formation of stable DNPH (2,4 dinitrophenylhydrazine) in the presence of formaldehyde