Standard method of test for radioactive manganese in water

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

OSTI ID:7364422

A method is described for the determination of concentrations of /sup 54/Mn and /sup 56/Mn above 10/sup -3/ ..mu..Ci/l in H/sub 2/O. Radioactive Mn and carrier are first precipitated as MnO/sub 2/ and finally as the gravimetric precipitate Mn(H/sub 2/PO/sub 4/)/sub 2/ for chemical yield determination and counting. The final precipitate is mounted and counted by ..gamma.. spectrometry using a Ge(Li) or NaI detector. Using a Ge(Li) detector, the peaks of the two isotopes are separated, and only a single measurement is required; however, if a NaI detector is used and both isotopes are to be determined, two countings are necessary. The first is made immediately after the chemical separation, and the second is made about 2 days later after the /sup 56/Mn has decayed leaving a direct measure of the /sup 54/Mn. The /sup 56/Mn is then determined by difference. A large amount of chloride makes the first precipitation difficult, and large amounts of stable Mn will cause errors in the chemical yield determination. The standard deviation of the method for a single operator is 2.5 percent. (BLM)

• OSTI ID: 7364422
• 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)
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHEMICAL ANALYSIS
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
GAMMA SPECTROSCOPY
HOURS LIVING RADIOISOTOPES
HYDROGEN COMPOUNDS
INTERFERING ELEMENTS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MANGANESE 54
MANGANESE 56
MANGANESE ISOTOPES
NUCLEI
ODD-ODD NUCLEI
OXYGEN COMPOUNDS
PRECIPITATION
RADIOISOTOPES
RELIABILITY
SEPARATION PROCESSES
SPECTROSCOPY
WATER