A NOVEL METHOD FOR THE PREPARATION OF CARRIER-FREE LEAD-212

Journal Article · Sat Oct 01 04:00:00 EDT 1960 · Journal of Inorganic and Nuclear Chemistry

DOI:https://doi.org/10.1016/0022-1902(60)80070-X· OSTI ID:4110528

Kahn, M.; Langhorst, A. L.

A procedure is described for preparing carrier-free Pb/sup 212/ from a nitric acid solution of thorium nitrate that is refluxed in a modified Soxhlet extractor. The thoron escaping the boiling solution is carried into the upper part of the apparatus where the water vapor condenses; the thoron is collected there and decays to Po/sup 216/, which decays to Pb/sup 212/; the Pb/sup 212/ is subsequently washed onto and retained by the resin column, which replaced the extraction thimble in the apparatus. The lead activity is eluted from the resin and removed from the condenser walls with 1N hydrochloric acid. The results of several experiments are summarized as: dependence of recovery of reflux time; effect of HNO/sub 3/ concentration on recovery; and dependence of recovery on solution volume. The yield was essentially independent of reflux times less than 15 hr, decreased slightly with increase in volume of solution, and was only slightly dependent on HNO) concentration; the yield was highest ( yields 45%) at a HNO/sub 3/ concentration of lM. (B.O.G.)

• Research Organization: Univ. of New Mexico, Albuquerque, NM (US); Sandia Corp., Albuquerque, NM (US)
• Sponsoring Organization: US Atomic Energy Commission (AEC)
• DOE Contract Number: AT(29-1)-789
• NSA Number: NSA-15-006023
• OSTI ID: 4110528
• Report Number(s): SCDC-995
• Journal Information: Journal of Inorganic and Nuclear Chemistry, Journal Name: Journal of Inorganic and Nuclear Chemistry Journal Issue: 3-4 Vol. Vol: 15; ISSN 0022-1902
• Country of Publication: United States
• Language: English

Related Subjects

BOILING
CHEMISTRY
DECONTAMINATION
EXTRACTION COLUMNS
HYDROCHLORIC ACID
LEAD 212
NITRIC ACID
POLONIUM 216
PREPARATION
RADON 220
RECOVERY
RESINS
SOLUTIONS
SOXHLETS
THORIUM NITRATES
VAPORS
VOLUME
WATER