ABSTRACT
EPN (phenylphosphonothioic acid 0-ethyl 0-p-nitrophenyl ester; CAS#2104-64-5), malathion {[(dimethoxyphosphinothioyl)thio] butanedioic acid diethyl ester; CAS#121-75-5}, and parathion [phosphorothioic acid, 0,0-diethyl 0-(4-nitrophenyl) ester; CAS#56-38-2] are effectively removed and retained from an air sample by passing a measured volume through a glass fiber filter.
