First results from platinum reference samples published

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.



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

Science Highlights

Surprisingly heavy silicon isotopes in the surface and deep Arctic Ocean

Brzezinski and his colleagues report on a comprehensive study of the Arctic Ocean silicic acid concentrations and silicon isotopic composition…


Science Highlights

Unique winter dataset of particulate and dissolved cadmium in the Indian sector of the Southern Ocean

Cloete and collaborators analysed particulate and dissolved cadmium at 7 stations in austral winter along a North South section off South Africa.


Science Highlights

A new proxy for ocean iron bioavailability

The approach established and verified in this study, opens a new way for determining dissolved iron bioavailability in samples across the ocean.


Science Highlights

Scavenging differentiates the distribution of cadmium, nickel, zinc and copper in the North Pacific Ocean

Zheng and co-authors observed sectional distributions of cadmium, nickel, zinc, and copper in the North Pacific Ocean during three GEOTRACES related cruises…