Determination of biogenic component in liquid fuels by the 14C direct LSC method by using quenching properties of modern liquids for calibration

Krajcar Bronić, Ines; Barešić, Jadranka; Horvatinčić, Nada; Sironić, Andreja (2017) Determination of biogenic component in liquid fuels by the 14C direct LSC method by using quenching properties of modern liquids for calibration. Radiation Physics and Chemistry, 137 . pp. 248-253. ISSN 0969-806X

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Abstract

The fraction of biogenic component within various types of materials that can be used as fuels for energy production and transport can be determined by measuring their 14C activity. The method is based on different 14C signatures of the biogenic and the fossil components: while the biogenic component reflects the modern atmospheric 14C activity, no 14C is present in fossil fuels. A direct measurement of the 14C content in liquid fuel by liquid scintillation counter is a simple and fast technique but has a main disadvantage: different liquid colors cause different quenching properties and affect the measurement efficiency. We propose a new evaluation technique that uses liquids of different colors to construct modern and background calibration curves. Various binary mixtures of biogenic liquids have been used to verify the relation between the count rate and the quenching parameter. Mixtures of a biogenic and a 14C-free liquid demonstrated the potential of the proposed technique for determining the biogenic fraction of a mixture.

Item Type:	Article
Uncontrolled Keywords:	radiocarbon 14C; liquid scintillation counting; biogenic component; liquid fuels; color quenching
Subjects:	NATURAL SCIENCES > Physics NATURAL SCIENCES > Chemistry NATURAL SCIENCES > Interdisciplinary Natural Sciences NATURAL SCIENCES > Interdisciplinary Natural Sciences > Radiation Science
Divisions:	Division of Experimental Physics
Depositing User:	Ines Krajcar Bronić
Date Deposited:	20 Jul 2017 08:18
URI:	http://fulir.irb.hr/id/eprint/3511
DOI:	10.1016/j.radphyschem.2016.01.041

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