Among indoor air pollutants, the aldehydes are of particular interest due to their impact on health because they are mainly indoor air polluants which emitted from building materials and adhesives. Formaldehyde is also contributed by various construction materials, including pressed wood products made with urea formaldehyde resins or phenol formaldehyde resins, conversion varnishes, and latex paints. In this study, aldehyde levels were compared with new dwellings and old types under the various indoor conditions. Aldehydes were sampled in each indoor sampling site using 2,4-DNPH cartridge. Formaldehyde, acetaldehyde, and acrolein appeared to be the major indoor aldehydes without relating any type of apartment. This study also revealed that propionaldehyde, butylaldehyde and benzaldehyde were of minor importance compared to formaldehyde level.

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