title: Rapid kinetic spectrophotometric determination of phosalone (Zolone) in a commercial formulation.
abstract: A kinetic study of the degradation of phosalone in an alkaline medium was undertaken by using a pneumatic stopped-flow system. A rapid semiautomatic method is proposed for determining phosalone. Linear calibration graphs up to 8.0 x 10(-5) M (detection limit = 1.40 x 10(-6) M) were obtained, with a measurement period of only 3.5 s per sample and a relative standard deviation of 1.4%. Several pesticides were assayed as interference species, and several did not interfere even at a 6:1, M:M foreign species/phosalone ratio. A strong interference (ratio < 1) was generated by azinphos-methyl and carbaryl. The proposed method was applied to the analysis of a commercial formulation, and the results were validated by comparison with those for a chromatographic method.
authors.affiliation: University of Extremadura, Department of Analytical Chemistry, Badajoz, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Espinosa-Mansilla
authors.forename: A
authors.initials: A
authors.lastname: Guiberteau Cabanillas
authors.forename: F
authors.initials: F
authors.lastname: Salinas
authors.forename: N
authors.initials: N
authors.lastname: Mora
authors.forename: A
authors.initials: A
authors.lastname: Zamoro
mesh_terms: D004355:Drug Stability; D006863:Hydrogen-Ion Concentration; D007306:Insecticides / Q000032:analysis*; D007700:Kinetics; D009946:Organothiophosphorus Compounds / Q000032:analysis*; D011786:Quality Control; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D007306:Insecticides; D009946:Organothiophosphorus Compounds; C003117:phosalone