Abstract
The researches on identification of additives of lubricating oil in bilge were carried out with the infrared spectroscopy.
We added methanol of equivalent volume to samples under heating by water bath and mixing by magnitic stirrer, and desolved the additives of lubricating oil to methanol.
The solvent was then removed and residual substance was examined by the infrared spectroscopy.
On this report in the manner described above, we made the experiment to identify additives of lubricating oil in the ship's bottom bilge.
This method may be applied to identify the bilge contained lubricating oil in discharge accidents of oily water into the sea.
