Abstract
AbstractThe short-lived radionuclide 234Th is widely used to study particle scavenging and transport from the upper ocean to deeper waters. This manuscript optimizes, reviews and validates the collection, processing and analyses of total 234Th in seawater and suggests areas of further improvements. The standard 234Th protocol method consists of scavenging 234Th from seawater via a MnO2 precipitate, beta counting, and using chemical recoveries determined by adding 230Th. The revised protocol decreases sample volumes to 2 L, shortens wait times between steps, and simplifies the chemical recovery process, expanding the ability to more rapidly and safely apply the 234Th method.
Funder
National Aeronautics and Space Administration
Woods Hole Oceangraphic Institution, Ocean Twilight Zone
Publisher
Springer Science and Business Media LLC
Subject
Health, Toxicology and Mutagenesis,Public Health, Environmental and Occupational Health,Spectroscopy,Pollution,Radiology, Nuclear Medicine and imaging,Nuclear Energy and Engineering,Analytical Chemistry
Reference38 articles.
1. Santschi PH, Murray JW, Baskaran M, Benitez-Nelson CR, Guo LD, Hung C-C, Lamborg C, Moran SB, Passow U, Roy-Barman M (2006) Thorium speciation in seawater. Mar Chem 100:250–268
2. Coale KH, Bruland KW (1985) 234Th:238U disequilibria within the California Current. Limnol Oceanogr 30(1):22–33
3. Hirose K, Tanoue E (1994) Thorium-particle matter interaction. Thorium complexing capacity of oceanic particulate matter: theory. Geochim Cosmochim Acta 58:1–7
4. Hirose K, Tanoue E (1998) The vertical distribution of the strong ligand in particulate organic matter in the North Pacific. Mar Chem 59:235–252
5. Buesseler KO, Bacon MP, Cochran JK, Livingston HD (1992) Carbon and nitrogen export during the JGOFS North Atlantic Bloom Experiment estimated from 234Th:238U disequilibria. Deep-Sea Res 39(7/8):115–1137
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