Pb-229 ガソリン中のバイオエタノール濃度を簡易測定する装置の開発(ポスターセッション2:2.技術,研究発表,(ポスター発表))

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Liquid scintillation counting (LSC) is useful for determining bioethanol contents in gasoline. In this study, we developed a very simple and low cost liquid scintillation counting (LSC) apparatus without an external standard gamma-ray source for determining bioethanol contents in gasoline. To investigate the usefulness of the apparatus, E3 (gasoline containing 3% bioethanol) was measured. The samples for the measurements were prepared by the two-step extraction method we have developed previously, by which fuel dye was removed and bioethanol was concentrated. The bioethanol contents in E3 was successfully determined; differences between the experimental and theoretical values were smaller than the counting error (±2σ). It seemed that the counting time over 250 min for each sample was required to assure quantitative measurements.
2012-01-18