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

East-West contrasting fate and anthropogenic inputs for dissolved trace metals in the Subarctic Pacific Ocean

Chan and co-authors report the full-depth distribution of dissolved nickel, copper, zinc, and cadmium in the North Pacific Ocean.

Comprehensive quantification of the rare earth element cycle in the northwest Pacific Ocean

Cao and co-authors investigate dissolved rare earth elements and the factors controlling their distributions in the northwest Pacific Ocean.

Iron and zinc isotopes disentangle the anthropogenic, natural and wildfire sources of aerosols over the North and Equatorial Pacific Ocean

Bunnell and co-authors analysed aerosol iron and zinc isotopic compositions along the North Pacific GEOTRACES GP15 section (Alaska-Tahiti).

Contribution of sandy beaches to the oceanic silica cycle

This paper calls into question the commonly accepted idea of an oceanic silicon cycle in equilibrium.

Rechercher