Aldehydes are a widely recognized as hazardous pollutants in both the atmosphere and building interiors. This report introduces the methods of analysis for formaldehyde and acetaldehyde, which are two of the most commonly analyzed aldehydes. A High Performance Liquid Chromatography (HPLC) was used as an analyzer.
Aldehydes were collected using the "sampling bag method," which is used mainly for VOC measurement in automotive interior materials.
As a pretreatment, the sample is placed in a Tedlar bag and heated for a period of time to release the aldehydes. The gas is then suctioned out with a sampling pump and collected on a DNPH cartridge. Acetonitrile is passed through the DNPH collection cartridges to elute the aldehydes. The recovered eluent is analyzed by HPLC to detect the aldehydes.