title: Determination of pentachlorophenol by flow-injection analysis with spectrophotometric detection.
abstract: Two FIA methods for the determination of pentachlorophenol, based on its oxidizing-condensation reaction with 4-aminoantipyrine in aqueous medium and spectrophotometric detection in the conventional and stopped-flow modes, are described. In both cases the calibration graphs are linear in the range from 1.0 to 60.0 mug/ml pentachlorophenol, with sampling rates of 48 and 28 samples/hr for triplicate analysis, respectively. Interferences from phenol and other chlorophenols have been evaluated. The stopped-flow method is particularly useful for determining pentachlorophenol in commercial formulations containing no more than 15% of other chlorophenols.
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, E-28040 Madrid, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Rodriguez-Alcala
authors.forename: P
authors.initials: P
authors.lastname: Yañez-Sedeño
authors.forename: L M
authors.initials: LM
authors.lastname: Diez