Analytical Sciences

Abstract − Analytical Sciences, 20(4), 739 (2004).

Determination of Vanadium in Heavy Oils by Atomic Absorption Spectrometry Using a Graphite Furnace Coated with Tungsten
Yoshikazu NAKAMOTO,* Tatsuro ISHIMARU,** Nobutaka ENDO,** and Koji MATSUSAKI**
*Application Research Section, Chemicals Research Laboratory, Idemitsu Petrochemical Co., Ltd., Shinguu, Syunan 745-8691, Japan
**Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Yamaguchi University, Tokiwadai, Ube 755-8611, Japan
A simple and rapid method was established for the direct determination of vanadium in an oil sample using the tungstencoated 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.