DEHP

We performed residential indoor fine particle (PM2.5) measurement from 26 homes and three outdoor monitoring locations. Six PM2.5-bound phthalate easters (PAEs) — including dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DnBP), butyl benzyl phthalate (BBP), di(2-ethylhexyl) phthalate (DEHP), and di-n-octyl phthalate (DnOP) — were measured using a thermal desorption-gas chromatography/mass spectrometer method. Average concentrations of summation of six PAEs (Σ6PAEs) in residential indoors (646.9 ng/m3) were slightly lower than the outdoor levels.

Recently, products of chemical reaction have been at issue as the topic of research on Indoor AirQuality. In this study, the emission mechanism of 2-ethyl-1-hexanol (2E1H) is studied. It has beenreported that 2E1H at high concentrations is measured in indoor air over the long term. The emissionmechanism for 2E1H is considered that water with high pH in concrete slabs and self-leveling sub-floormaterial reacts to di-2-ethylhexyl phthalate (DEHP) in PVC flooring and compounds containing the2-ethyl-1-hexyl group in the adhesive.