Keywords: trace analytics toxicity stream Insecticides Systems: stream Substances: Chlorpyrifos (SBPBAQFWLVIOKP-UHFFFAOYSA-N) Acrinathrin (YLFSVIMMRPNPFK-WEQBUNFVSA-N) Cyfluthrin (OFHFONYRMVKULH-WNYJFNBPSA-N) Cyphenothrin (FJDPATXIBIBRIM-UHFFFAOYSA-N) Deltamethrin (OWZREIFADZCYQD-NSHGMRRFSA-N) Empenthrin (YUGWDVYLFSETPE-JLHYYAGUSA-N)