Tris (1-chloro-2-propyl) phosphate (TCPP), Tris (2-chloroethyl) phosphate (TCEP), Tris (1, 3-dichloro-2-propyl) phosphate (TDCPP), and Triphenyl phosphate (TPhP) were bought from AccuStandards as analytical standards for OPFRs. Analytical standards for PAHs and phthalates were purchased from Sigma Aldrich in a mixture named EPA-525 semi volatiles and quanti ed using internal standards (i) acenaphthylene (Acy-d10), phenanthrene (Phe-d12), and chrysene (Cry-d12). PAHs namely acenaphthylene (Acy), anthracene (Ant), benz (a) anthracene (BaA), benzo (a) pyrene (BaP), benzo (b) uoranthene (BbF), benzo (g,h,i) perylene (BghiP), benzo (k) uoranthene (BkF), chrysene (Chr), dibenz (a, h) anthracene (DahA), uoranthene (Flu), indeno (1,2,3-cd) pyrene (IcdP), phenanthrene (Phe), and pyrene (Pyr) were analyzed along with benzyl butyl phthalate (BzBP), bis (2-ethylhexyl) adipate (DEHA), bis (2-ethylhexyl) phthalate (DEHP), dibutyl phthalate (DBP), diethyl phthalate (DEP), and dimethyl phthalate (DMP). Acetone, dichloromethane (DCM), n-hexane (n-Hex), and iso-octane were of analytical grade and obtained from Sigma Aldrich. All the glass used was baked at 400°C overnight and kept at 100°C until use.