Chlorinated paraffins in indoor air and dust: Concentrations, congener patterns, and human exposure

• Published in: Environment international 2011-10, Vol.37 (7), p.1169-1174
• Main Authors: Fridén, Ulrika E., McLachlan, Michael S., Berger, Urs
• Format: Article
• Language: English
• Subjects: Adult; Adults; Air; Air Pollutants - analysis; Air Pollution, Indoor - analysis; Air Pollution, Indoor - statistics & numerical data; Biological and medical sciences; Chains; Child, Preschool; Chlorinated paraffins (CPs); Dust; Dust - analysis; Environmental Monitoring; Environmental pollutants toxicology; Gas Chromatography-Mass Spectrometry; Human; Human exposure; Humans; Hydrocarbons, Chlorinated - analysis; Indoor; Indoor environment; Indoor environments; Infant; Inhalation Exposure - analysis; Inhalation Exposure - statistics & numerical data; Ionization; Male; Medical sciences; Paraffin - analysis; Paraffins; Polychlorinated n-alkanes (PCAs); Sweden; Toxicology
• ISSN: 0160-4120; 1873-6750; 1873-6750
• DOI: 10.1016/j.envint.2011.04.002

Chlorinated paraffins (CPs) are large production volume chemicals used in a wide variety of commercial applications. They are ubiquitous in the environment and humans. Human exposure via the indoor environment has, however, been barely investigated. In the present study 44 indoor air and six dust samples from apartments in Stockholm, Sweden, were analyzed for CPs, and indoor air concentrations are reported for the first time. The sumCP concentration (short chain CPs (SCCPs) and medium chain CPs (MCCPs)) in air ranged from < 5–210 ng m −3 as quantified by gas chromatography coupled to electron ionization tandem mass spectrometry (GC/EI–MS/MS). Congener group patterns were studied using GC with electron capture negative ionization MS (GC/ECNI–MS). The air samples were dominated by the more volatile SCCPs compared to MCCPs. SumCPs were quantified by GC/EI–MS/MS in the dust samples at low μg g −1 levels, with a chromatographic pattern suggesting the prevalence of longer chain CPs compared to air. The median exposure to sumCPs via the indoor environment was estimated to be ~ 1 μg day −1 for both adults and toddlers. Adult exposure was dominated by inhalation, while dust ingestion was suggested to be more important for toddlers. Comparing these results to literature data on dietary intake indicates that human exposure to CPs from the indoor environment is not negligible. ► We studied the human exposure to chlorinated paraffins (CPs) via the indoor environment. ► CP concentrations ranged from < 5–210 ng m −3 in air, and were at low μg g −1 levels in dust. ► Estimated median indoor exposure to CPs ~ 1 μg day −1 for both adults and toddlers. ► Human exposure to CPs via the indoor environment is not negligible.