0731. Solving a chemistry problem

53. To analyze Rhine River water for the presence of pesticides, a 100-liter sample was pumped through a pre-column packed with sorbent (97% recovery) and then eluted from the surface of the sorbent with 10 ml of solvent. 1 ml of a standard aniline solution with a concentration of 0.1 mg/l was added to the resulting solution. The mixture was analyzed by HPLC with a diode array detector. Peaks of the following substances were detected


Spica substance, units. Spica substance, units.
aniline 29 metabromuron 262
carbendazim 135 methesechlor 13
metamitron 78 propazine 15
chlordiazon 26 warfarin 82
dimethoate 14 3,3-dichlorobenzidine 27
monomethylmethoxuron 8 barban 19
aldicarb 81 alachlor 10
bromacil 54 nitralin 13
cyanazine 76 dinoseb 11
2-nitrophenol 34 dinoterb 15
chlortoluron 28 phoxim 8
atrazine 10 nitrophen 124
diuron 1129 trifluralin 46
Analysis of standard samples of pesticides with a concentration of 0.1 mg/l gave the following results:
Spica substance, units. Spica substance, units.
aniline 40 metabromuron 38
carbendazim 42 methesechlor 41
metamitron 46 propazine 39
chlordiazon 38 warfarin 43
dimethoate 39 3,3-dichlorobenzidine 48
monomethylmethoxuron 41 barban 52
aldicarb 40 alachlor 37
bromacil 45 nitralin 44
cyanazine 42 dinoseb 56
2-nitrophenol 40 dinoterb 54
chlortoluron 44 phoxim 68
atrazine 36 nitrophen 39
diuron 35 trifluralin 41
Calculate the content of pesticides in Rhine water, mg/l.