DOE Test Method CHEM-TP-A.1


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Source:
DOE

Method Name:
Actinides in Small Environmental Samples by Sequential Determination . Official Name: Actinides in Small Environmental Samples by Sequential Determination

Description:
Soil and samples that contain silica are dissolved completely in potassium floride fusions. Water samples are evaporated almost to dryness and the residues are dissolved in pyrosulfate fusions. Samples that contain organic material are treated as small soil samples afterh the organic meterial has been oxidized.The actinides are separated from the bulk of the sample with barium sulfate. The barium sulfate is dissolved in alkaline EDTA and the actinides are precipitated as hydroxides. The actinides are separated from each other by coprecipitation with neodymium fluoride after adjusting their oxidation states. Each fraction is mounted on a 0.1 um membrane filter and counted in an alpha spectrometer.

Scope:
This procedure determines the actinides in soil, water, filter papers, sludges, ores and various types of organic samples. It is also well suited for analyses of hazardous wastes.

Citation:
Dept. of Energy RESL Technical Procedure

Interferences:
(A) High calcium concentrations: Samples that contain high concentrations of calcium can cause severe chemical interferences. No radiochemical interferences are known.

QC Requirements:
QC procedures based on internal laboratory requirements for radiochemical analysis.

Maximum Holding Time:
None given.

Media:
WATER

Subcategory:
Radiochemical

Concentration:
None given.

Sample Prep:
None given.

Precision:
-

Detection:
Detection Limits (DL) for actinides based on 1 gram and 50 mL samples.

Revision Number:
Apr-99

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