Substances: Cyfluthrin (OFHFONYRMVKULH-WNYJFNBPSA-N) Bifenthrin (OXCDWLBJSLVWHB-LKRLXIKPSA-N) Deltamethrin (OWZREIFADZCYQD-NSHGMRRFSA-N) Keywords: pyrethroids trace analytics stream Insecticides