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 the trace metals from 9 mL of seawater onto a chelation resin column, which is then eluted directly into a magnetic sector ICP-MS. Precision of 1–3% (RSD) and very good agreement with reference consensus values are obtained for most of the elements in less than 9 min per analysis.

13 Langstrom l

Figure: This figure shows the on-line flow injection system. Click here to view the figure in high resolution.

 

Reference:

M.E. Lagerström, M.P. Field, M. Séguret, L. Fischer, S. Hann, R.M. Sherrell Automated on-line flow-injection ICP-MS determination of trace metals (Mn, Fe, Co, Ni, Cu and Zn) in open ocean seawater: Application to the GEOTRACES program, Marine Chemistry, Volume 155, 20 September 2013, p. 71–80 DOI: 10.1016/j.marchem.2013.06.001 Click here to access the paper.

Latest highlights

Science Highlights

Trace metal quotas in small flagellates: diatoms are challenged!

Sofen and colleagues found that in natural plankton assemblages and in culture, small flagellates operated at the lower range of iron quotas.

14.09.2022

Science Highlights

A vivid picture of particle distribution and sources in the Arctic Ocean

Extensive description of particle concentrations and chlorophyll-a fluorescence distribution along Arctic GEOTRACES sections.

08.09.2022

Science Highlights

The Tonga arc, an iron boundary in the South West Pacific Ocean

As part of the TONGA GEOTRACES process study, Tilliette and colleagues identified high dissolved iron concentrations in the west of the Tonga arc.

31.08.2022

Science Highlights

Dominance of the benthic flux of rare earth elements on continental shelves

Deng and his colleagues focus on one of the largest land–ocean interfaces in Asia, the Changjiang River–East China Sea system.

30.08.2022

Rechercher