Standard method of test for radionuclides of radium in water. [/sup 223/Ra, /sup 224/Ra, and /sup 226/Ra, precipitation and alpha-counting]
The separation and determination of dissolved Ra in water is described. Due to the choice of detector, the method is limited to ..cap alpha..-emitting isotopes. The lower limit of detection of the method is 1 pCi/l. Ra is separated from water by coprecipitation with mixed barium and lead sulfates. After the precipitate is washed with HNO/sub 3/, it is dissolved in EDTA; and the Ba and Ra sulfates are reprecipitated by the addition of acetic acid to separate them from Pb and other radionuclides. The precipitate is dried on a plate, weighed for determination of chemical yield, and ..cap alpha..-counted to determine the total disintegrations of Ra isotopes, generally /sup 223/Ra, /sup 224/Ra, and /sup 226/Ra. Since /sup 224/Ra does not usually occur with the other two, /sup 223/Ra may be determined by difference if /sup 226/Ra has been determined separately. If, on the other hand, the total amounts of /sup 223/Ra and /sup 226/Ra are low, /sup 224/Ra may be determined directly. The precision of the method for a single operator is about 5 percent. (BLM)
- OSTI ID:
- 7343196
- Journal Information:
- Annu. Book ASTM Stand.; (United States), Vol. 45; Other Information: ASTM-D--2460-70
- Country of Publication:
- United States
- Language:
- English
Similar Records
Radionuclides of radium in water - 1973
DETERMINATION OF RADIUM 226 IN MILL EFFLUENTS
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
RADIUM 223
ALPHA SPECTROSCOPY
PRECIPITATION
RADIUM 224
RADIUM 226
WATER
RADIOCHEMICAL ANALYSIS
ACCURACY
STANDARDS
ALKALINE EARTH ISOTOPES
ALPHA DECAY RADIOISOTOPES
CHEMICAL ANALYSIS
DAYS LIVING RADIOISOTOPES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HEAVY NUCLEI
HYDROGEN COMPOUNDS
ISOTOPES
NUCLEI
OXYGEN COMPOUNDS
RADIOISOTOPES
RADIUM ISOTOPES
SEPARATION PROCESSES
SPECTROSCOPY
YEARS LIVING RADIOISOTOPES
400103* - Radiometric & Radiochemical Procedures- (-1987)
520300 - Environment
Aquatic- Radioactive Materials Monitoring & Transport- (1989)