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Tachikawa, Japan

Taki M.,Coast Guard Research Center | Nagai M.,Tokyo University of Agriculture and Technology
Industrial and Engineering Chemistry Research | Year: 2010

Twenty marine-engine lubricants from five Japanese oil companies were discriminated on the basis on a hopane analysis using a gas chromatograph-mass spectrometer (GC-MS). The hopane ratios of 18α-22,29,30-trisnorneohopane (1) to 17α-22,29,30-trisnorhopane (2) and of 17α-21β(H)- norhopane (3) to 17α-21β(H)-hopane (5) were determined. Each lubricant can be discriminated by combining the figures represented by the 1 to 2 and 3 to 5 ratios and principal component analysis from 1 through (22R)-17α-21β(H)-29-pentakishomohopane (15). Oleanane (4), one of the biomarkers inherent in the crude oils from Southeast Asia, has been detected in the lubricants of eight out of 20 types, and 4 represents a significant feature for the discrimination. The discrimination of the lubricants in the spilled oils was also investigated. © 2010 American Chemical Society. Source


Taki M.,Tokyo University of Agriculture and Technology | Taki M.,Coast Guard Research Center | Izhar S.,Tokyo University of Agriculture and Technology | Nagai M.,Tokyo University of Agriculture and Technology
Journal of the Japan Petroleum Institute | Year: 2011

Analysis of bio-oil derived from activated sludge using biomarkers was performed by spectorscopic methods. The methods successfully determined the distinction between the oil derived form activated sewage sludge (bio-oil) and crude oil (heavy fuel oil). Source


Taki M.,Coast Guard Research Center | Taki M.,Tokyo University of Agriculture and Technology | Otomo N.,Coast Guard Research Center | Otani H.,Coast Guard Research Center | And 3 more authors.
Journal of the Japan Petroleum Institute | Year: 2011

A rapid analysis method is proposed to distinguish between gas oil and fuel oil discharged into sea area. The proposed analysis was performed on a FT-IR spectrometer. Because those oils could be distinguished from three peaks at 811, 742 and 723 cm-1, they were used as discrimination indices. Those peaks are assigned to CH bending modes for 2 and 4 hydrogens and methylene framework, respectively. As a result, the absorption intensities of gas oil was 742<811<723 cm-1, but those of the fuel oil was 723<742<811 cm-1. The absorption of 1603 cm-1 was larger in fuel oil than gas oil. And the absorption of 475 cm-1 was not observed in gas oil, while it was in fuel oil. Because the frequency intensities were peculiar to the oil types, the spectra offered the rapid type analysis of the discharged fuel oil and gas oil. However, the frequencies of 2955, 2925, 2854, 1462 and 1377 cm-1 of the gas oil were hardly distinguished from those of the fuel oil. This method was effective for the analysis of the discharged gas oil and fuel oil into sea areas. Source

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