Standard method of test for radionuclides of radium in water. [/sup 223/Ra, /sup 224/Ra, and /sup 226/Ra, precipitation and alpha-counting]

Journal Article · Wed Jan 01 04:00:00 EST 1975 · Annu. Book ASTM Stand.; (United States)

OSTI ID:7343196

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), Journal Name: Annu. Book ASTM Stand.; (United States) Vol. 45; ISSN ASTSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400103* -- Radiometric & Radiochemical Procedures-- (-1987)
520300 -- Environment
Aquatic-- Radioactive Materials Monitoring & Transport-- (1989)
54 ENVIRONMENTAL SCIENCES
ACCURACY
ALKALINE EARTH ISOTOPES
ALPHA DECAY RADIOISOTOPES
ALPHA SPECTROSCOPY
CHEMICAL ANALYSIS
DAYS LIVING RADIOISOTOPES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HEAVY NUCLEI
HYDROGEN COMPOUNDS
ISOTOPES
NUCLEI
OXYGEN COMPOUNDS
PRECIPITATION
RADIOCHEMICAL ANALYSIS
RADIOISOTOPES
RADIUM 223
RADIUM 224
RADIUM 226
RADIUM ISOTOPES
SEPARATION PROCESSES
SPECTROSCOPY
STANDARDS
WATER
YEARS LIVING RADIOISOTOPES