Resolving mass fractions and congener group patterns of C-C chlorinated paraffins in commercial products: Associations with source characterization.

Commercial chlorinated paraffins (CPs) are a source of CPs in the environment, and clarification of the different CP groups present in commercial products is important for source characterization. Resolving CP congener groups is hindered by the complex CP compositions of commercial products. We used comprehensive two-dimensional gas chromatography coupled with electron capture negative ionization high-resolution time-of-flight mass spectrometry to profile 57 C - C CP congener groups in 18 CP-42, CP-52, and CP-70 commercial products.

Spatial distributions, source apportionment and ecological risks of C-C chlorinated paraffins in mangrove sediments from Dongzhai Harbor, Hainan Island.

The spatial distributions, possible sources of C-C chlorinated paraffins (CPs), and the ecological risks posed in mangrove sediment in Dongzhai Harbor (Hainan Island, China) were investigated. Comprehensive two-dimensional gas chromatography combined with electron capture negative ionization mass spectrometry was used to determine 50 C-C CP congener groups. The concentrations of C-CPs, short-chain CPs (SCCPs), and medium-chain CPs (MCCPs) in the mangrove sediment samples were 8.