A review of present techniques and methodological advances in analyzing 234Th in aquatic systems

Michiel M Rutgers van der Loeff, Manmohan M Sarin, Mark Baskaran, Claudia Benitez-Nelson, Ken O Buesseler, Matthew Charette, Minhan Dai, Orjan Gustafsson, Pere Masque, Paul Morris, Kent Orlandini, Alessia Rodriguez y Baena, Nicolas Savoye, Sabine Schmidt, Robert Turnewitsch, Ingrid Voge, James T Waples

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Abstract

The short-lived thorium isotope Th-234 (half-life 24.1 days) has been used as a tracer for a variety of transport processes in aquatic systems. Its use as a tracer of oceanic export via sinking particles has stimulated a rapidly increasing number of studies that require analyses of Th-234 in both marine and freshwater systems. The original Th-234 method is labor intensive. Thus, there has been a quest for simpler techniques that require smaller sample volumes. Here, we review current methodologies in the collection and analysis of Th-234 from the water column, discuss their individual strengths and weaknesses, and provide an outlook on possible further improvements and future challenges. Also included in this review are recommendations on calibration procedures and the production of standard reference materials as well as a flow chart designed to help researchers find the most appropriate Th-234 analytical technique for a specific aquatic regime and known sampling constraints. (c) 2005 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)190-212
Number of pages23
JournalMAR CHEM
Issue number0
DOIs
Publication statusPublished - 2006

Keywords

  • SCAVENGING RATES
  • ANTHROPOGENIC RADIONUCLIDE DISTRIBUTIONS
  • GULF-OF-MEXICO
  • SERIES NUCLIDES
  • Chemistry, Multidisciplinary
  • ARABIAN SEA
  • Oceanography
  • PARTICULATE ORGANIC-CARBON
  • ARCTIC-OCEAN
  • PARTICLE RESIDENCE TIMES
  • ATLANTIC-OCEAN
  • THORIUM ISOTOPES

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    Rutgers van der Loeff, M. M., Sarin, M. M., Baskaran, M., Benitez-Nelson, C., Buesseler, K. O., Charette, M., Dai, M., Gustafsson, O., Masque, P., Morris, P., Orlandini, K., Rodriguez y Baena, A., Savoye, N., Schmidt, S., Turnewitsch, R., Voge, I., & Waples, J. T. (2006). A review of present techniques and methodological advances in analyzing 234Th in aquatic systems. MAR CHEM, (0), 190-212. https://doi.org/10.1016/j.marchem.2005.10.012