title: Use of photochemical reactions in flow injection: determination of oxalate in urine.
abstract: The use of photochemical reactions in flow injection (FI) is reported. The irradiation of an FI reactor with a suitable source facilitates the development of the iron(III)-oxalate reaction, allowing the amperometric determination of the anion in the range 1.0-13.0 micrograms ml-1, with a relative standard deviation of 1.1% and a sampling frequency of 40 h-1. The proposed method was applied successfully to the determination of oxalate in urine samples.
authors.affiliation: Department of Analytical Chemistry, Faculty of Sciences, University of Córdoba, Spain.
authors.forename: L E
authors.initials: LE
authors.lastname: Leon
authors.forename: A
authors.initials: A
authors.lastname: Ríos
authors.forename: M D
authors.initials: MD
authors.lastname: Luque de Castro
authors.forename: M
authors.initials: M
authors.lastname: Valcárcel
mesh_terms: D006801:Humans; D008832:Microchemistry; D010070:Oxalates / Q000652:urine*; D019815:Oxalic Acid; D010777:Photochemistry
chemical_list: D010070:Oxalates; D019815:Oxalic Acid