On the optimal use of the seaFAST system

Do you wish to improve your recoveries, blanks or any other parameter of your seawater preconcentration system (seaFAST)? Or are you simply curious about it? Wuttig and co-workers (2019, see reference below) propose a critical evaluation of this system’s capabilities. They perform an impressive list of tests including system conditioning, improving blank levels, finding the optimal […]

Apr / 18 / 2019

Analyzing rapidly, precisely and semi-automatically lead isotopes on variable volumes of seawater (up to 1000 ml)

Zurbrick and co-authors present a relatively fast (2.5–6.5 hours), semi-automated system to extract lead (Pb) from seawater, with few chemicals yielding low blanks. They also demonstrate that subsequent Pb isotopic analyses are more precise using a multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS) than high resolution ICP-MS (HR ICP-MS). With the preceding work of Conway […]

Dec / 03 / 2013

New method for measuring simultaneously trace metal concentrations on a very small volume of seawater

An automated, on-line extraction, flow-injection inductively coupled plasma mass spectrometry (ICP-MS) method is presented by Lagerström and co-authors for simultaneous determination of manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu) and zinc (Zn) in open ocean seawater samples. This fully automated commercially available system buffers the pH of the samples on-line and extracts […]

Nov / 27 / 2013

Latest recommendations for successful analysis of dissolved osmium in seawater

Analysis of osmium in seawater presents complex challenges, linked to its very low (femtomolar) concentrations and multiplicity of possible oxidation states. Early insights were provided by Karl Turekian’s group at Yale where it was realized that osmium tends to concentrate both in oxidizing Fe-Mn nodules and in reducing organic-rich marine sediments. Efforts to directly measure […]

Jul / 02 / 2013

Measuring precisely with only 40 ml of sample

It is now possible to measure precisely manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), cadmium (Cd), and lead (Pb) concentrations in seawater using only 40 ml of sample. All the cooking recipes and techniques are given in the recent detailed article of Dondra Biller and Kenneth Bruland in Marine Chemistry […]

May / 03 / 2012

New strategy to evaluate trace element fluxes to the ocean from aerosols

Scientists participating in GEOTRACES have developed a new strategy to evaluate trace element fluxes to the ocean from aerosols (Hsieh et al, 2011). The new approach uses the common geochemical behaviour of two isotopes of the same chemical element (thorium;Th), whose sources to the surface seawater are totally different (and independent). 230Th is a decay product […]

Apr / 23 / 2012