| Autor: |
Narita H; Department of Oceanography, Florida State University, Tallahassee, Florida 32306, U.S.A., Harada K, Burnett WC, Tsunogai S, McCabe WJ |
| Jazyk: |
angličtina |
| Zdroj: |
Talanta [Talanta] 1989 Sep; Vol. 36 (9), pp. 925-9. |
| DOI: |
10.1016/0039-9140(89)80031-1 |
| Abstrakt: |
An improved method for determination of (210)Pb, (210)Bi and (210)Po in both natural waters and solid materials has been developed. Polonium-210 is spontaneously plated onto a silver disc from dilute hydrochloric acid medium. Bismuth-210 is then electro-deposited onto a platinum gauze cathode directly from the same solution, with a graphite rod as anode. Finally, (210)Pb is electro-deposited from a fluoroborate medium onto the same platinum gauze, used as the anode. All three nuclides are subsequently measured by standard low-level alpha and beta counting techniques. The speed of this method (approximately 6 hr per sample after pretreatment) is a distinct advantage over existing techniques, as (210)Bi must be quickly separated from (210)Pb because of its 5.02-day half-life. Another advantage of this method is that the chemical form of the sample solution is suitable for use of established separation schemes for determining other decay-series isotopes (U, Th, Pa, etc.) after the three short-lived nuclides have been processed. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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