Abstract
The disposition of petroleum was managed to sulphuric ash used of sulphuric acid and to watery solution, vanadium and nickel contents contained in it were analyzed by the apparatus of Anodic Stripping Voltammetry (ASV) used of Hanging Mercury Droped Electrode (HMDE) .
The number of analytical sample used in this experiment was 6 crude oils with different values of vanadium and nickel contents and 2 lubricating oils that contained obstructing-ion of zinc and other substance.
From the results, it was proved that: -
(1) Vanadium and nickel contents in crude oil could be analyzed at the same time when iron oxidized substance was not recognized to coexist together in oil.
(2) Vanadium and nickel contents in crude oil could be analyzed each separately by treatment with Fe-EDTA masking when iron oxidized substance was recognized to coexist together in oil.
(3) Nickel content in oil could be analyzed but vanadium content could not be analyzed if zinc content exists rather in excess.
(4) Accuracy of repetition in this measuring method was under 0.02 ppm of vanadium content and under 0.03 ppm of nickel content, and this method gave fairly good agreement with JPI experimental results.
