title: Determination of oxyfluorfen herbicide and oxyfluorfen amine residues in garbanzo beans by liquid chromatography.
abstract: Oxyfluorfen and oxyfluorfen amine were determined by liquid chromatography (LC) with ultraviolet (UV) and photoconductivity detection (PCD). A simple extraction procedure acceptably recovered both analytes from garbanzo beans over a wide range of fortifications (0.05 to 20 ppm) (83 +/- 4 for oxyfluorfen; 85 +/- 4 for oxyfluorfen amine). Percent recoveries decreased slightly as the fortification level decreased. Both analytes could be determined simultaneously at a concentration greater than 0.2 ppm in garbanzo beans. Detection limits were 3 ng for oxyfluorfen and 100 ng for oxyfluorfen amine using LC/UV, and 12 ng for both oxyfluorfen and oxyfluorfen amine with LC/PCD. Different knitted reaction coils and photoreactors were evaluated. Photoproduct yields and identification were determined by ion chromatography. The LC/PCD method measures oxyfluorfen and oxyfluorfen amine separately and has a shorter analysis time, while the standard method using gas chromatography measures total residues and is more sensitive.
authors.affiliation: Department of Agricultural Biochemistry, University of Hawaii, Honolulu 96822.
authors.forename: M
authors.initials: M
authors.lastname: Zhou
authors.forename: C J
authors.initials: CJ
authors.lastname: Miles
mesh_terms: D002853:Chromatography, Liquid; D007887:Fabaceae / Q000032:analysis*; D055768:Halogenated Diphenyl Ethers; D007202:Indicators and Reagents; D010573:Pesticide Residues / Q000032:analysis*; D010647:Phenyl Ethers / Q000032:analysis*; D010946:Plants, Medicinal; D013056:Spectrophotometry, Ultraviolet
chemical_list: D055768:Halogenated Diphenyl Ethers; D007202:Indicators and Reagents; D010573:Pesticide Residues; D010647:Phenyl Ethers; C016027:oxyfluorofen