Substances: Acrinathrin (YLFSVIMMRPNPFK-WEQBUNFVSA-N) Transfluthrin (DDVNRFNDOPPVQJ-HQJQHLMTSA-N) Empenthrin (YUGWDVYLFSETPE-JLHYYAGUSA-N) Systems: stream Keywords: trace analytics toxicity stream pyrethroids Insecticides