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![Organophosphate esters in tree bark and human hair in Weifang and Yantai, Shandong Province, China: concentrations, profiles and sources](https://image.oaes.cc/bf216913-d3f7-44d2-98a4-df2d9c4b982d/4824.fig.1.jpg)
Figure 1. Concentrations of organophosphate esters in tree bark from Weifang (WF) and Yantai (YT), Shandong Province, China. OPEs: Organophosphate esters; TCEP: Tris(2-chloroethyl)phosphate; TCPP: tris(2-chloroisopropyl)phosphate; TDCPP: tris(2,3-dichloropropyl)phosphate; TEP: tris(2-ethylhexyl)phosphate; TNBP: tris(n-butyl)phosphate; TPHP: triphenyl phosphate; TOCP: tris(o-cresyl)phosphate; TMCP: tris(m-cresyl)phosphate; TPCP: tris(p-cresyl)phosphate.