Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing 100191, China.
Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing 100191, China.
Sci Total Environ. 2021 May 15;769:144701. doi: 10.1016/j.scitotenv.2020.144701. Epub 2021 Jan 19.
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. Very short-chain CPs (vSCCPs), including CCl and CCl CPs, and other chlorinated aromatic compounds were identified in the commercial products. The mass fractions of total vSCCPs, short-chain CPs (SCCPs) and medium-chain CPs (MCCPs) in the commercial products ranged from 0.02% to 3.61%, 0.75% to 51.4%, and 0.39% to 69.1%, respectively. Two-dimensional hierarchical cluster analysis with a heat map plot highlighted variations in the C - C CP congener group patterns among different commercial CP formulations. The principal component analysis results indicated that commercial CPs products might be important contributors to vSCCPs, SCCPs, and MCCPs in various environmental matrices. This study provides comprehensive and well-resolved compositional data for CPs in commercial products, which will be helpful for CP source characterization.
商业氯化石蜡 (CPs) 是环境中 CPs 的来源，阐明商业产品中存在的不同 CP 组对于源特征描述非常重要。由于商业产品中 CP 组成复杂，解析 CP 同系物组存在一定的困难。我们使用全面二维气相色谱法结合电子捕获负电离高分辨率飞行时间质谱法对 18 种 CP-42、CP-52 和 CP-70 商业产品中的 57 种 C-C CP 同系物组进行了分析。在商业产品中发现了非常短链氯化石蜡 (vSCCPs)，包括 CCl 和 CCl 氯化石蜡，以及其他氯化芳香族化合物。商业产品中总 vSCCPs、短链氯化石蜡 (SCCPs) 和中链氯化石蜡 (MCCPs) 的质量分数范围分别为 0.02%至 3.61%、0.75%至 51.4%和 0.39%至 69.1%。二维层次聚类分析和热图突出了不同商业 CP 配方中 C-C CP 同系物组模式的变化。主成分分析结果表明，商业 CPs 产品可能是各种环境基质中 vSCCPs、SCCPs 和 MCCPs 的重要来源。本研究为商业产品中的 CPs 提供了全面且分辨率较高的组成数据，有助于 CP 源特征描述。
