Abstract
The studies on identification of discharged oil into the sea were carried out with the analysis of vanadium contents, nickel contents and the ratio of vanadium/nickel (V/Ni).
From the results, it was proved that: -
(1) Analysis of vanadium contents, nickel contents and the ratio of V/Ni in oil may enable identification of the productionzone of imported crude oil.
(2) Vanadium contents, nickel contents in oil and the ratio of V/Ni were little changed in weathering.
(3) At the discharge accidents of oil into the sea, a kind of crude oil and similarity of oils can be estimated by the use of vanadium contents, nickel contents and the ratio of V/Ni.
