Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
Environ Sci Technol. 2021 May 4;55(9):5836-5847. doi: 10.1021/acs.est.0c07825. Epub 2021 Apr 23.
Current environmental monitoring studies are generally confined to several target organophosphate esters (OPEs), and there is a lack of strategies for comprehensively screening all potential OPEs in environmental samples. Here, an effective and accurate strategy was developed for the target, suspect, and functional group-dependent screening of OPEs by the use of ultrahigh-performance liquid chromatography-Q Exactive hybrid quadrupole-Orbitrap high-resolution mass spectrometry (UHPLC-Q-Orbitrap HRMS), and this strategy was applied for the analysis of = 74 sediment samples (including 23 surface sediment samples and 51 sediment core samples) collected from Taihu Lake (eastern China) in 2019. In these analyzed samples, we successfully identified = 35 OPEs, and 23 of them were reported in this region for the first time. In addition, this strategy also presented other interesting findings, i.e., (1) OPE concentrations decreased with increasing distance from the coast of the lake; (2) the newly identified 3-hydroxyphenyl diphenyl phosphate (-OH-TPHP) was not statistically significantly correlated with triphenyl phosphate (TPHP; = 0.02494, = 0.9101) but with resorcinol bis(diphenyl phosphate) (RDP) ( = 0.9271, < 0.0001) and three other OPEs; and (3) the summed concentrations of aryl OPEs (∑OPEs) in sediment core samples exhibited significantly increasing trends as the depth decreased. Collectively, this study provided an effective strategy that was successfully applied for comprehensive screening of OPEs in the sediments of Taihu Lake, and this strategy could have promising potential to be extended to other environmental matrices or samples.
目前的环境监测研究通常局限于几种目标有机磷酸酯（OPEs），缺乏综合筛选环境样品中所有潜在 OPEs 的策略。在这里，我们使用超高效液相色谱-Q Exactive 混合四极杆-Orbitrap 高分辨率质谱（UHPLC-Q-Orbitrap HRMS）开发了一种有效且准确的策略，用于目标、可疑和基于功能组的 OPE 筛选，并将该策略应用于 2019 年从中国东部太湖采集的 74 个沉积物样品（包括 23 个表层沉积物样品和 51 个沉积物芯样品）的分析。在这些分析的样品中，我们成功鉴定了 35 种 OPEs，其中 23 种是该地区首次报道的。此外，该策略还呈现出其他有趣的发现，即：（1）OPE 浓度随离湖岸距离的增加而降低；（2）新鉴定的 3-羟基苯基二苯基磷酸酯（-OH-TPHP）与三苯基磷酸酯（TPHP； = 0.02494， = 0.9101）没有统计学上的显著相关性，但与间苯二酚双（二苯基磷酸酯）（RDP； = 0.9271， < 0.0001）和其他三种 OPE 有显著相关性；（3）沉积物芯样品中芳基 OPEs（∑OPEs）的总和浓度随深度的降低呈显著增加趋势。总的来说，本研究提供了一种有效的策略，成功地应用于太湖沉积物中 OPEs 的综合筛选，该策略有望扩展到其他环境基质或样品。
