title: Gas chromatographic method for determination of fenitrothion in fenitrothion technical and in formulated products: collaborative study.
abstract: A gas chromatographic (GC) method for determination of fenitrothion in fenitrothion technical and formulated products has been subjected to a collaborative study with 7 participating laboratories. Formulations are extracted with chloroform containing dibutyl sebacate as an internal standard and are analyzed by gas chromatography using an OV-210 column. Collaborators were furnished matched pairs of technical product and water-dispersible powder and emulsifiable concentrate formulations. Relative standard deviations for reproducibility (RSDR) for the paired samples were 0.54, 1.00, and 1.56%, respectively, for technical fenitrothion, water-dispersible powders, and emulsifiable concentrates. The method has been approved interim official first action as an alternative to the present official first action AOAC method 6.A19-6.A24, which uses a polyphenyl ether, 6 ring (PPE-6R) column packing and fluoranthene as internal standard.
authors.affiliation: Centers for Disease Control, Division of Parasitic Diseases, Atlanta, GA 30333.
authors.forename: D L
authors.initials: DL
authors.lastname: Mount
authors.forename: F C
authors.initials: FC
authors.lastname: Churchill
mesh_terms: D002849:Chromatography, Gas; D005278:Fenitrothion / Q000032:analysis*; D007202:Indicators and Reagents; D012996:Solutions
chemical_list: D007202:Indicators and Reagents; D012996:Solutions; D005278:Fenitrothion