Substances: Bifenthrin (OXCDWLBJSLVWHB-LKRLXIKPSA-N) λ-Cyhalothrin (ZXQYGBMAQZUVMI-QQDHXZELSA-N) Chlorpyrifos-methyl (HRBKVYFZANMGRE-UHFFFAOYSA-N) Keywords: pyrethroids trace analytics