Organizations: Environmental Analytical Chemistry Variables: concentration Keywords: pyrethroids Substances: Allethrin (ZCVAOQKBXKSDMS-UHFFFAOYSA-N) Acrinathrin (YLFSVIMMRPNPFK-WEQBUNFVSA-N) Chlorpyrifos-methyl (HRBKVYFZANMGRE-UHFFFAOYSA-N)