Indoor air — Part 4: Determination of formaldehyde — Diffusive sampling method
|Publication Date:||1 December 2011|
|ICS Code (Ambient atmospheres):||13.040.20|
This part of ISO 16000 specifies a determination of formaldehyde in indoor air using a diffusive sampler with solvent desorption and high performance liquid chromatography (HPLC).
The test method is applicable to the measurement of formaldehyde 1 ) in indoor air over the range from 0,001 mg/m3 to 1,0 mg/m3 for a sampling period of between 24 h and 72 h. For sampling periods of 24 h, the applicable concentration range is 0,003 mg/m3 to 1 mg/m3, and for 72 h it is 0,001 mg/m3 to 0,33 mg/m3.
NOTE Confirmed samplers with respect to measurement sensitivity and precision can apply to short-term sampling (less than 24 h).
The method is suitable for measurements in atmospheres with conventional indoor air relative humidity and for monitoring at air velocities as low as 0,02 m/s. The chromatographic step in the method is designed to eliminate potential interferences, including those due to the presence of other carbonyl compounds. The sampling method gives a time-weighted average result.
NOTE There are several diffusive samplers with various designs
and shapes commercially available. They are all based on the
reaction of 2,4-dinitrophenylhyd
1) Instead of systematic IUPAC nomenclature, traditional names are used in this part of ISO 16000, e.g. "formaldehyde" is used instead of "methanal".