title: Flow injection determination of chromium(III) by pyrogallol chemiluminescence.
abstract: A flow injection method is proposed for the determination of nanogram amounts of chromium(III) using a pyrogallol chemiluminescence system. It is based on its catalytic effect on the oxidation of pyrogallol with periodate at a neutral medium. The addition of 3-(N-morpholino)propanesulphonic acid to the reaction system increased the chemiluminescence signal for chromium(III). The present method allows the determination of 5-100ng/ml of chromium(III). The relative standard deviation of 2.2% (n = 10) was obtained at 20 ng/ml of chromium(III) and the detection limit (signal-to-noise ratio = 2) was 1 ng/ml with the sampling frequency of 25/hr.
authors.affiliation: Chemical Institute, Faculty of Education, Tottori University, Koyama-cho, Tottori 680, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Nakano
authors.forename: M
authors.initials: M
authors.lastname: Fukuda
authors.forename: S
authors.initials: S
authors.lastname: Kageyama
authors.forename: H
authors.initials: H
authors.lastname: Itabashi
authors.forename: T
authors.initials: T
authors.lastname: Kawashima