Dimethoate, 100 µg/ml, Toluene, 1ml

2,3,4,6-Tetrabromo[13C6]phenol, 1.2ml x 100ug/ml, toluene

2-Amino-1-methyl-6-phenylimidazo[4,5-b]py ridine (PhIP), 5mg

WS inorganic disinfection by-products, A