First results from platinum reference samples published

Science Highlights

2 April 2014

In Cobelo-García and co-authors work, data on platinum (Pt) concentrations in SAFe and GEOTRACES reference samples is reported for the first time. The paper also provides helpful information for those using voltammetric procedures for the analysis of trace elements in seawater, where the use of signal processing (e.g. second derivative) can successfully be used to overcome the effects of intensive matrix background or the presence of interfering peaks.

14 cobelo

Figure: Original and second derivative voltammetric scans obtained in a coastal seawater sample at 180 s and 600 s accumulation time on a HMDE. Conditions: 0.5 M H2SO4, 3.3 mM formaldehyde, 0.45 mM hydrazine. Platinum concentration in cell: 0.55 pM. Click here to view the figure larger.

 

Reference:

Cobelo-García, A., Santos-Echeandía, J., López-Sánchez, D. E., Almécija, C., & Omanović, D. (2014). Improving the voltammetric quantification of ill-defined peaks using second derivative signal transformation: example of the determination of platinum in water and sediments. Analytical chemistry, 86(5), 2308–13. doi:10.1021/ac403558y. Click here to access the paper.

Latest highlights

Continuous record of the Antarctic Circumpolar Current latitude over the last glacial-interglacial cycles

The meridional positions of the oceanic fronts separating subtropical and Antarctic waters are key to constraining the mechanisms that drive the degassing of deeply-stored CO2 at the end of the glacial periods…

23 Million Years of iron sources reconstructed in the Northwest Pacific Ocean using iron isotopes in a ferromanganese crust

Using iron isotopes and elemental records, Chu and co-workers analysed an iron-manganese crust recovered from the Hongyan Seamount, and reconstructed the sources of dissolved Fe to the Northwest Pacific Ocean…

Variability of the past deep-water masses in the Arabian Sea over the last 41ka

Shukla and colleagues propose a high-resolution authigenic ƐNd record measured from a sediment core located in the eastern Arabian Sea…

Arctic outflows to Davis Strait and the Labrador Sea traced by radionuclide distributions

This study demonstrates that Arctic outflows through the Canadian Arctic Archipelago play a much more significant role than previously recognised.

Rechercher