title: Arsenic determination with graphite-cloth ribbon in graphite-furnace atomic-absorption spectrometry.
abstract: The determination of arsenic by atomic-absorption spectrometry with use of a graphite-cloth ribbon placed inside various types of graphite tubes was investigated. It was found that the graphite-cloth ribbon greatly enhances the sensitivity for arsenic and reduces the interferences from various heavy metals, especially when it is placed inside a pyrolytic graphite tube and a nitric acid matrix is used. This is attributed to condensation of arsenic on the ribbon, owing to a temperature lag during the drying and ashing cycles, and to the formation of interlamellar compounds of arsenic with graphite.
authors.affiliation: Department of Chemistry, Faculty of Science, Hiroshima University, Hiroshima 730, Japan.
authors.forename: E
authors.initials: E
authors.lastname: Iwamoto
authors.forename: C H
authors.initials: CH
authors.lastname: Chung
authors.forename: M
authors.initials: M
authors.lastname: Yamamoto
authors.forename: Y
authors.initials: Y
authors.lastname: Yamamoto