Fig, 11  U.S. Patent  Feb.28,2017  Sheet 11 of 23  US 9,583,325 B2  16 ------------------ ,.._,  <"?  0  ~  ><  X  ::s  •  l’U  _....  .._  8  X  ....,  C:  - (U  C:  0’)  •- UJ  0  * Trichtorophenol  • Triclosan  ■  Nonylphenol  • Gemfibrozil  y  = 738x - 239  R2  =  0.999  y  =  181x .. 99.9  R $^{2 }$=  0.998  20  Concentration  I  ppb  40 