Unexpectedly High Concentrations of a Newly Identified Organophosphate Ester, Tris(2,4-di- tert-butylphenyl) Phosphate, in Indoor Dust from Canada.
Environ Sci Technol
; 52(17): 9677-9683, 2018 09 04.
Article
en En
| MEDLINE
| ID: mdl-30074770
ABSTRACT
Organophosphate esters (OPEs) represent a group of additives with significant levels of production and significant application to various household and industrial products. Given their potential adverse effects on human health, accurate analysis of novel OPEs in indoor dust is crucial. In this study, the novel tris(2,4-di- tert-butylphenyl) phosphate (AO168âO) and six well-known OPEs were investigated. The seven target OPEs were detected in 100% of the office and home dust samples, with ∑OPEs (sum of the OPE concentrations) ranging from 2.92 to 124 µg/g [geometric mean (GM) of 12.3 µg/g]. Surprisingly, the novel AO168âO (0.10-11.1 µg/g, GM of 1.97 µg/g) was among the highest-concentration congeners, contributing 1.36-65.5% to ∑OPEs (mean of 20.7%). AO168âO was the dominant congener in the home dust samples, indicating it is an important OPE congener overlooked previously. AO168âO was also detected in Standard Reference Material 2585 (indoor dust) at an elevated concentration of 10.9 µg/g, which was significantly higher than the concentrations of the other target OPEs (0.38-2.17 µg/g). Despite the high concentrations measured in this study, no industrial production or application could be identified for AO168âO. The precursor of AO168âO, tris(2,4-di- tert-butylphenyl) phosphite, was detected in 50% of the dust samples, with a GM concentration of 1.48 ng/g. This study demonstrates that human OPE exposure in indoor environments is greater than was previously reported. This is the first report of the occurrence of AO168âO, its precursor, and its hydrolysis products in the environment.
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Banco de datos:
MEDLINE
Asunto principal:
Telomerasa
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Retardadores de Llama
País como asunto:
America do norte
Idioma:
En
Año:
2018
Tipo del documento:
Article