NEMI Method Summary


Method Summary Information

Method Number:

CHEM-TP-SR.06

Media:

OTHER

Revision:

June 1999

Method Source:

U.S. Department of Energy Radiological and Environmental Services Laboratory

Analytes in this method

Subcategory:

RADIOCHEMICAL

Official Name:

SULFATE METHOD FOR SR-89 AND SR-90 IN LIQUID RADIOACTIVE WASTES OR WATERS

Descriptive Name

Sr-89 and Sr-90 in Liquid Radioactive Wastes or Waters by Beta Counting

Source Info:

U.S. Department of Energy Radiological and Environmental Services Laboratory
850 Energy Drive
MS4149
Idaho Falls, ID 83401

Citation:

RESL Technical Procedure

966324

Byte file

Brief Method
Summary:

Strontium sulfate (SrSO₄) is precipitated and then dissolved in a EDTA solution. SrSO₄ is preferentially precipitated from EDTA and a lower pH. The sulfate precipitate is metathesized to a carbonate. After barium is separated as a chromate, the Sr is reprecipitated as a sulfate. Total radioactive Sr is determined by beta counting the SrSO₄. The strontium sample is then dissolved in EDTA and set aside for Y-90 ingrowth. After a suitable ingrowth period, Y-90 is separated and counted on Y₂(C₂O₄)₃ - 9H₂O. The Sr-90 is determined by beta counting its Y-90 daughter. Sr-89 is determined as the difference between total radioactive Sr and Sr-90.

Scope And
Application:

This procedure is applicable to samples that must be analyzed for Sr-89, 90 in liquid radioactive wastes or waters and for samples that must be decontaminated from Ba-140.

Applicable
Conc Range:

None given.

Interferences:

None given.

QC Requirements:

QC procedures based on internal laboratory requirements for radiochemical analysis.

Sample Handling:

Procedure calls for the use of 10 M NaOH, Glacial acetic acid, 15 M NH₄OH, and 1.5 M Na₂CrO₄. Take proper precautionary measures. Use a fume hood, Wear gloves, safety glasses/face shield, and protective clothing.

Max Holding Time:

None given.

Relative Cost:

$51 to $200

4866

Page 1

Method Summary Information