Development of a colorimetric test for quantification of uranium in drinking water |
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Authors: | Amy E Hixon David P DiPrete Timothy A DeVol |
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Institution: | 1. Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC, 29634-0919, USA 2. Savannah River National Laboratory, Savannah River Site, Aiken, SC, 29808, USA
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Abstract: | A colorimetric method was developed for the determination of uranium in groundwater. The detection limit for the method is approximately 25 μg/L uranium, which is below the maximum contaminant level for uranium in drinking water, 30 μg/L. The method is rapid and requires little technical training to conduct, allowing it to be used by consumers, in the laboratory, or in the field. The two-step technique involves preconcentrating uranium using a U/TEVA-2 extraction chromatographic resin followed by complexation with a pyridylazo indicator dye, 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol. If color change is visible to the eye, the concentration of uranium in groundwater is above the detection limit. Preconcentration using U/TEVA-2 also serves to eliminate metals that may interfere with the quantification of uranium. |
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