室内环境是有机磷阻燃剂和增塑剂(OPFRs)的典型来源,然而,OPFRs在不同微环境中的来源特征仍不太清楚。这项研究从天津一所大学的4个典型微环境中收集了109个室内空气样本和34个配对的室内灰尘样本,中国,包括宿舍,office,图书馆,和信息中心。分析了29个目标OPFRs,通过基于片段的非目标分析鉴定了新型有机磷化合物(NOPs)。目标OPFRs表现出最高的空气和粉尘浓度,分别为46.2-234ng/m3和20.4-76.0μg/g,分别,在信息中心,氯化OPFR占主导地位。磷酸三苯酯(TPHP)是办公室空气中的主要OPFR,而三(2-氯乙基)磷酸酯在粉尘中占主导地位。TPHP在图书馆中占主导地位。磷酸三乙酯(TEP)在宿舍中无处不在,和三(2-丁氧基乙基)磷酸是特别高的粉尘。首次确定了25个NOP中的9个,主要来自信息中心和办公室,例如双(氯丙基)2,3-二氯丙基磷酸酯。二苯基次膦酸,三(2,4-二叔丁基苯基)亚磷酸酯(AO168)的两种羟基化和甲基化代谢物,在室内环境中新报道了一种二聚体磷酸盐。NOP与目标OPFRs广泛相关,它们的人类暴露风险和环境行为值得进一步研究。
The indoor environment is a typical source for organophosphorus flame retardants and plasticizers (OPFRs), yet the source characteristics of OPFRs in different microenvironments remain less clear. This study collected 109 indoor air samples and 34 paired indoor dust samples from 4 typical microenvironments within a university in Tianjin, China, including the dormitory, office, library, and information center. 29 target OPFRs were analyzed, and novel organophosphorus compounds (NOPs) were identified by fragment-based nontarget analysis. Target OPFRs exhibited the highest air and dust concentrations of 46.2-234 ng/m3 and 20.4-76.0 μg/g, respectively, in the information center, where chlorinated OPFRs were dominant. Triphenyl phosphate (TPHP) was the primary OPFR in office air, while tris(2-chloroethyl) phosphate dominated in the dust. TPHP was predominant in the library. Triethyl phosphate (TEP) was ubiquitous in the dormitory, and tris(2-butoxyethyl) phosphate was particularly high in the dust. 9 of 25 NOPs were identified for the first time, mainly from the information center and office, such as bis(chloropropyl) 2,3-dichloropropyl phosphate. Diphenyl phosphinic acid, two hydroxylated and methylated metabolites of tris(2,4-ditert-butylphenyl) phosphite (AO168), and a dimer phosphate were newly reported in the indoor environment. NOPs were widely associated with target OPFRs, and their human exposure risk and environmental behaviors warrant further study.