fig2

Figure 2. Contributions of nine organophosphate esters in human hair and tree bark samples from Weifang (WF) and Yantai (YT), Shandong Province, China. 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.