title: A practical and accurate method for the determination of 234Th simultaneously with 210Po and 210Pb in seawater.
abstract: A practical technique has been developed for the determinations of (234)Th simultaneously with (210)Po and (210)Pb in seawater samples, which greatly simplifies the on-board chemical procedures and enables an accurate correction of (234)Th ingrowth. A unique feature of this technique lies in the exact determination of co-precipitated (238)U following Fe(OH)(3) precipitation which leads to an exact correction of ingrown (234)Th between Fe(OH)(3) precipitation and U/Th separation. Such a correction eliminates several cumbersome on-board chemistry steps (such as Po plating, Fe(2+) oxidation, and 9 N HCl anion exchange) required in regular procedures to eliminate the (234)Th 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.
authors.affiliation: College of Marine Studies, University of Delaware, Newark, DE 19716, USA. gkim@ocean.fsu.edu
authors.forename: G
authors.initials: G
authors.lastname: Kim
authors.forename: N
authors.initials: N
authors.lastname: Hussain
authors.forename: T M
authors.initials: TM
authors.lastname: Church
authors.forename: H S
authors.initials: HS
authors.lastname: Yang