title: Advanced Stopped-in-Loop Flow Analysis with a Reagents-Merging Zones Technique for a Catalytic Successive Determination of Vanadium and Iron.
abstract: An advanced stopped-in-loop flow analysis (SILFA) is proposed for the catalytic determinations of vanadium and iron. The chemistry relies on a vanadium- or iron-catalyzed oxidative reaction of p-anisidine by bromate or hydrogen peroxide in the presence of an activator (Tiron or 1,10-phenanthlorine) to form a red dye (510 nm). Reagents for the vanadium- or iron-catalyzed reaction are well mixed by a reagents-merging zones technique. A sample solution is loaded together with well-mixed reagents into a loop in the SILFA configuration, followed by spectrophotometric detection. The advanced SILFA system provides a selective method for the trace determination of vanadium and iron.
authors.affiliation: Department of Applied Chemistry, Aichi Institute of Technology.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Ayala Quezada
authors.forename: Hiroya
authors.initials: H
authors.lastname: Murakami
authors.forename: Norio
authors.initials: N
authors.lastname: Teshima
authors.forename: Tadao
authors.initials: T
authors.lastname: Sakai
authors.forename: Shoji
authors.initials: S
authors.lastname: Motomizu