Determination of vanadium in heavy oils by atomic absorption spectrometry using a graphite furnace coated with tungsten.
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.
Nakamoto
Yoshikazu
Y
Application Research Section, Chemicals Research Laboratory, Idemitsu Petrochemical Co., Ltd., Shinguu, Syunan 745-8691, Japan. yoshikazu.nakamoto@si.idemitsu.co.jp
Ishimaru
Tatsuro
T
Endo
Nobutaka
N
Matsusaki
Koji
K