DOE RESL: CHEM-TP-SR.1: Strontium-90 in Soil, Water, and Filter Samples
|
Official Method Name
|
Strontium-90 in Soil, Water, and Filter Samples |
|---|---|
|
Current Revision
| May 1998 |
|
Media
|
VARIOUS |
|
Instrumentation
|
Beta Counter |
|
Method Subcategory
|
Radiochemical |
|
Method Source
|
|
|
Citation
|
|
|
Brief Method Summary
|
One gram of soil is dissolved in potassium fluoride and pyrosulfate fusions to guarantee total sample dissolution. The pyrosulfate cake is dissolved and strontium precipitated as the sulfate. For water samples, the strontium is separated from the bulk of the solution by direct precipitation as the sulfate. Air filter and organic samples are wet ashed and then treated as soil samples. The strontium sulfate is dissolved in EDTA and reprecipitated to separate yttrium-90, other lanthanides and the actinides. The strontium sulfate is redissolved in EDTA, and set aside for yttrium-90 ingrowth. After ingrowth, the yttrium is precipitated as the hydroxide, dissolved in hydrochloric acid, and precipitated as oxalate. The oxalate is filtered on a glass fiber filter paper and counted in a low background beta counter. |
|
Scope and Application
|
This procedure determines strontium-90 in soil, water, air filters and a variety other sample types. The method uses total sample dissolution and will handle samples that contain abnormally high concentrations of calcium. |
|
Applicable Concentration Range
|
None given. |
|
Interferences
|
None given. |
|
Quality Control Requirements
|
QC procedures based on internal laboratory requirements for radiochemical analysis. |
|
Sample Handling
|
Safety glasses or face shield, lab coat, and appropriate chemical resistant gloves to protect skin and eyes should be worn. |
|
Maximum Holding Time
|
None given. |
|
Relative Cost
|
$51 to $200 |
|
Sample Preparation Methods
|
