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Titolo:
A practical and accurate method for the determination of Th-234 simultaneously with Po-210 and Pb-210 in seawater
Autore:
Kim, GB; Hussain, N; Church, TM; Yang, HS;
Indirizzi:
Univ Delaware, Coll Marine Studies, Newark, DE 19716 USA Univ Delaware Newark DE USA 19716 ll Marine Studies, Newark, DE 19716 USA Bukyong Natl Univ, Coll Marine Sci & Technol, Pusan 608737, South Korea Bukyong Natl Univ Pusan South Korea 608737 ol, Pusan 608737, South Korea
Titolo Testata:
TALANTA
fascicolo: 4, volume: 49, anno: 1999,
pagine: 851 - 858
SICI:
0039-9140(19990712)49:4<851:APAAMF>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
SERIES NUCLIDES; PACIFIC-OCEAN; ARABIAN SEA; DISEQUILIBRIA; WATERS; BI-210; ZONE; FATE;
Keywords:
seawater; chemical purification; Th-234;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Kim, GB Florida State Univ, Dept Oceanog, Tallahassee, FL 32306 USA Florida State Univ Tallahassee FL USA 32306 ahassee, FL 32306 USA
Citazione:
G.B. Kim et al., "A practical and accurate method for the determination of Th-234 simultaneously with Po-210 and Pb-210 in seawater", TALANTA, 49(4), 1999, pp. 851-858

Abstract

PI practical technique has been developed for the determinations of Th-234simultaneously with Po-210 and Pb-210 in seawater samples, which greatly simplifies the on-board chemical procedures and enables an accurate correction of Th-234 ingrowth. A unique feature of this technique lies in the exactdetermination of co-precipitated U-238 following Fe(OH)(3) precipitation which leads to an exact correction of ingrown Th-234 between Fe(OH)(3) precipitation and U/Th separation. Such a correction eliminates several cumbersome on-board chemistry steps (such as Po plating, Fe2+ oxidation, and 9 N HCl anion exchange) required in regular procedures to eliminate the Th-234 ingrowth. The total time required for on-board sample treatment (spike equilibration, Fe (OH)(3) co-precipitation and filtration) could be less than 10 h which significantly increases the sample processing efficiency and data throughput. (C) 1999 Elsevier Science B.V. All rights reserved.

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Documento generato il 11/07/20 alle ore 20:12:13