Short-, medium-, and long-chain chlorinated paraffins in South African indoor dust and cat hair

Martin Brits*, Jacob de Boer, Egmont R Rohwer, Jayne De Vos, Jana M Weiss, Sicco H Brandsma

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

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 (C9-C37) 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 > C20 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.

Original languageEnglish
Article number124643
JournalChemosphere
Volume238
Early online date22 Aug 2019
DOIs
Publication statusPublished - 1 Jan 2020

Bibliographical note

Copyright © 2019 The Authors. Published by Elsevier Ltd.. All rights reserved.

Keywords

  • Indoor dust
  • Indoor environment
  • Long-chain chlorinated paraffins
  • Medium-chain chlorinated paraffins
  • Pet cat hair
  • Short-chain chlorinated paraffins

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