DOE EML: Ra-04-RC: Radium-226 in Tap Water, Urine, and Feces
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Official Method Name
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EPA APPROVED - Radium-226 in Tap Water, Urine, and Feces |
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Current Revision
| EML Procedures Manual HASL-300, Volume 1, 28th Ed.(1997) |
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Media
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WATER |
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Instrumentation
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Pulse Ionization Chamber and Radon Bubbler |
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Method Subcategory
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Radiochemical |
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Method Source
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Citation
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Brief Method Summary
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After sample preparation, radium is isolated from most other elements by coprecipitation with barium sulfate. Further purification is obtained by the removal of silica with HF and reprecipitation of the sulfate. The sulfate precipitate is dissolved in alkaline EDTA to prepare the emanating solution. The chemical yield of barium is determined with the gamma emitting tracer Ba-133. |
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Scope and Application
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The procedure presented has been applied to tap water, ashed urine, and feces samples. Only Ra-226 yields Rn-222 progeny that has suitable characteristics for detection by an emanation technique; therefore, the procedure is specific. |
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Applicable Concentration Range
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None given. |
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Interferences
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Cross contamination: High-level and low-level samples should be processed in independent batches to minimize possibility of cross contamination. |
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Quality Control Requirements
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Reagent blanks must be analyzed with each set of samples. High-level and low-level samples should be processed in independent batches to minimize possibility of cross contamination. |
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Sample Handling
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None given. |
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Maximum Holding Time
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None given. |
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Relative Cost
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Sample Preparation Methods
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