title: Determination of vanadium in heavy oils by atomic absorption spectrometry using a graphite furnace coated with tungsten.
abstract: A simple and rapid method was established for the direct determination of vanadium in an oil sample using the tungsten-coated graphite-furnace AAS. The interference of the sulfur compound could be suppressed by choosing the ashing temperature. If the sulfur concentration in the sample is diluted to 1.0 wt% or less, the interference can be suppressed. This proposed method should make important contributions to the quality control of petroleum refineries.
authors.affiliation: Application Research Section, Chemicals Research Laboratory, Idemitsu Petrochemical Co., Ltd., Shinguu, Syunan 745-8691, Japan. yoshikazu.nakamoto@si.idemitsu.co.jp
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Nakamoto
authors.forename: Tatsuro
authors.initials: T
authors.lastname: Ishimaru
authors.forename: Nobutaka
authors.initials: N
authors.lastname: Endo
authors.forename: Koji
authors.initials: K
authors.lastname: Matsusaki