DOE EML: Ra-02-RC: Radium-226 - Emanation Procedure
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Official Method Name
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Radium-226 - Emanation Procedure |
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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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Radium-226 in solution can be determined by de-emanating its Rn-222 into an ionization chamber or scintillation cell for measurement. The Rn-222 can be de-emanated by bubbling an inert gas through the solution, either after equilibrium has been established or after any known time period. Two half-lives, 7.65 days for example, give 75% of the maximum buildup. |
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Scope and Application
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This procedure to determine Radium-226 is specific and may be applied to almost any matrix which can be converted to a homogeneous solution. |
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Applicable Concentration Range
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None given. |
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Interferences
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Reagent Contamination: Using distilled or organic reagents reduces possible contamination. |
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Quality Control Requirements
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Almost all types of samples require simultaneous analysis of reagent blanks, since radium appears in many chemical compounds. Using distilled or organic reagents reduces possible contamination. |
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Sample Handling
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The sample with barium carrier should be in homogeneous solution in a volume of 15-25 mL. The solution should be acidic with perchloric acid, neutral or in basic EDTA solution. Hydrochloric acid, NH3 or other volatile materials must be absent. Detailed preparation procedures for separation of radium from sample matrices are presented in other radium procedures in this EML HASL-300 Manual. |
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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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