Substances: Bifenthrin (OXCDWLBJSLVWHB-LKRLXIKPSA-N) Imiprothrin (VPRAQYXPZIFIOH-PYMCNQPYSA-N) Deltamethrin (OWZREIFADZCYQD-NSHGMRRFSA-N) Chlorpyrifos-methyl (HRBKVYFZANMGRE-UHFFFAOYSA-N) Keywords: pyrethroids trace analytics stream