Department of Environment and Health, Vrije Universiteit, Amsterdam, De Boelelaan 1085, 1081HV, Amsterdam, the Netherlands; Department of Chemistry, Faculty of Natural and Agricultural Sciences, University of Pretoria, Lynnwood Road, Pretoria, 0002, South Africa; National Metrology Institute of South Africa (NMISA), CSIR Campus, Meiring Naude Road, Pretoria, 0040, South Africa.
Department of Environment and Health, Vrije Universiteit, Amsterdam, De Boelelaan 1085, 1081HV, Amsterdam, the Netherlands.
Chemosphere. 2020 Jan;238:124643. doi: 10.1016/j.chemosphere.2019.124643. Epub 2019 Aug 22.
Polychlorinated n-alkanes or chlorinated paraffins (CPs) contain a magnitude of structural isomers and are categorized as short-chain (SCCPs), medium-chain (MCCPs), and long-chain (LCCPs) CPs, according to the carbon chain lengths. In this study the ƩSCCPs, ƩMCCPs, and ƩLCCP concentrations are reported for South African indoor dust and pet cat hair. The median concentrations of the ƩCPs (C-C) ranged from 33 to 663 μg/g for freshly collected dust (FD), 36-488 μg/g for dust collected from household vacuum cleaner bags (VD), and 1.2-15 μg/g for cat hair (CH) samples. MCCPs were the dominant CP group, followed by SCCPs and LCCPs. The ƩMCCP concentration ranged from 13 to 498 μg/g in dust and 0.6-6.5 μg/g in cat hair. SCCPs with shorter carbon chains and lower chlorine substitution were observed in cat hair. LCCPs with carbon chains > C were detected in dust and hair samples, possibly indicating the use of wax grade LCCP formulations. Non-traditional Kendrick mass defect plots were used to obtain information on the magnitude of CPs and provide evidence of possible interfering compounds. This is the first report on the occurrence of SCCPs, MCCPs, and LCCPs in the South African indoor environment.
多氯代直链烷烃或氯化石蜡（CPs）根据碳链长度可分为短链（SCCPs）、中链（MCCPs）和长链（LCCPs）CPs。本研究报告了南非室内灰尘和宠物猫毛中ΣSCCPs、ΣMCCPs 和 ΣLCCP 的浓度。新鲜收集的灰尘（FD）中 ΣCPs（C-C）的中位数浓度范围为 33-663μg/g，从家用吸尘器袋中收集的灰尘（VD）的浓度范围为 36-488μg/g，猫毛（CH）样本的浓度范围为 1.2-15μg/g。MCCPs 是主要的 CP 组，其次是 SCCPs 和 LCCPs。灰尘中ΣMCCP 的浓度范围为 13-498μg/g，猫毛中为 0.6-6.5μg/g。在猫毛中观察到较短碳链和较低氯取代的 SCCPs。在灰尘和毛发样本中检测到碳链＞C 的 LCCPs，可能表明使用了蜡级 LCCP 配方。非传统的 Kendrick 质量缺陷图用于获取有关 CP 数量的信息，并提供可能存在干扰化合物的证据。这是南非室内环境中 SCCPs、MCCPs 和 LCCPs 首次出现的报告。
