Micro-column solid phase extraction to determine uranium and thorium in environmental samples

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Title:	Micro-column solid phase extraction to determine uranium and thorium in environmental samples
Authors:	林群智;Lin, Chun-Chih;Tsai, Tsuey-Lin;Chu, Tieh-Chi
Contributors:	自然生物科技學系
Keywords:	Uranium;Thorium;Extraction chromatography;Geothermal water
Date:	2008-08
Issue Date:	2019-01-04 11:14:16 (UTC+8)
Abstract:	Extraction chromatographic separation techniques based on U/TEVA and TEVA resins were utilized to separate uranium and thorium isotopes in complex matrices from environmental samples. This approach has the advantages of ease of quantitative analysis, small sample size, an absence of mixed waste solvents, complete separation of U/Th isotopes, acceptable chemical yields and good energy resolution in the alpha spectrum. The procedure for analyzing alpha-emitting isotopes of uranium and thorium in geothermal water from Peito, Taiwan, is illustrated in detail. It involves sample pre-concentration, filtration and separation by highly selective extraction chromatographic resins, followed by electroplating and alpha-spectroscopy. The analytical results show a chemical recovery exceeding 55% for U and 65% for Th, respectively, under optimized conditions. The efficient and cost-effective use of recyclable columns makes the analytical methods simple, accurate, rapid, reliable and robust.
Relation:	Applied Radiation and Isotopes vol. 66, no. 8 pp.1097-1103
Appears in Collections:	[Department of Natural Biotechnology] Periodical Articles

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