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Pregled bibliografske jedinice broj: 1061712

Determination of sub-picomolar levels of platinum in the pristine Krka River estuary (Croatia) using improved voltammetric methodology


Pađan, Jasmin; Marcinek, Saša; Cindrić, Ana-Marija; Layglon, Nicolas; Garnier, Cedric; Salaün, Pascal; Cobelo-García, Antonio; Omanović, Dario
Determination of sub-picomolar levels of platinum in the pristine Krka River estuary (Croatia) using improved voltammetric methodology // Environmental chemistry, 17 (2020), 2; 74-84 doi:10.1071/EN19157 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 1061712 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Determination of sub-picomolar levels of platinum in the pristine Krka River estuary (Croatia) using improved voltammetric methodology
(Determination of sub-picomolar levels of platinum in the pristine Krka River estuary (Croatia) using improved voltammetric methodology)

Autori
Pađan, Jasmin ; Marcinek, Saša ; Cindrić, Ana-Marija ; Layglon, Nicolas ; Garnier, Cedric ; Salaün, Pascal ; Cobelo-García, Antonio ; Omanović, Dario

Izvornik
Environmental chemistry (1448-2517) 17 (2020), 2; 74-84

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
catalytic stripping voltammetry ; derivative transformation ; estuaries ; salinity gradient

Sažetak
Extremely low concentrations of platinum in natural waters require very sensitive analytical techniques, with adsorptive cathodic stripping voltammetry (AdCSV) being one of the most frequently used techniques. A ‘fine tuning’ of the voltammetric parameters, along with advanced data treatment based on derivative transformations, allowed us to determine reliably Pt levels down to 50 fM (0.05 pM). By using short modulation and interval times of the differential pulse stripping waveform, and applying a 4th derivative transformation to the voltammograms, the limit of detection (LOD) was lowered down to 10 fM. Although very small concentrations of surface-active substances (e.g. 0.025 mg L−1 fulvic acid) strongly influenced the method sensitivity, recoveries of spiked samples were not impacted (~100 %). The application of a desorption step (Eds = −1.35 V ; tds = 2 s) at the end of the accumulation significantly improved the sensitivity, presumably through the removal of adsorbed surface-active substances. Using this optimised methodology, we determined the Pt distribution in the pristine Krka River estuary in the winter and summer periods by performing both horizontal transects and vertical profiles (salinity ~1 to 39). In surface waters, dissolved Pt concentrations gradually increased towards the seawater end-member (from ~0.15 to ~0.3 pM). A small deviation from the conservative mixing line was observed at salinities below 10, which may reflect changes in Pt redox speciation. In bottom waters, the trend was opposite with dissolved Pt concentrations increasing towards the freshwater end-member, probably owing to progressive accumulation related to seawater residence time. On average, 90 % of Pt was present in the dissolved form.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Interdisciplinarne prirodne znanosti



POVEZANOST RADA


Projekt / tema
HRZZ-IP-2014-09-7530 - Novi metodološki pristupbiogeokemijskim istraživanjima specijacije metala u tragovima u obalnim vodenim ekosustavima (Dario Omanović, )

Ustanove
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Dario Omanović (autor)

Avatar Url Ana-Marija Cindrić (autor)

Avatar Url Saša Marcinek (autor)

Citiraj ovu publikaciju

Pađan, Jasmin; Marcinek, Saša; Cindrić, Ana-Marija; Layglon, Nicolas; Garnier, Cedric; Salaün, Pascal; Cobelo-García, Antonio; Omanović, Dario
Determination of sub-picomolar levels of platinum in the pristine Krka River estuary (Croatia) using improved voltammetric methodology // Environmental chemistry, 17 (2020), 2; 74-84 doi:10.1071/EN19157 (međunarodna recenzija, članak, znanstveni)
Pađan, J., Marcinek, S., Cindrić, A., Layglon, N., Garnier, C., Salaün, P., Cobelo-García, A. & Omanović, D. (2020) Determination of sub-picomolar levels of platinum in the pristine Krka River estuary (Croatia) using improved voltammetric methodology. Environmental chemistry, 17 (2), 74-84 doi:10.1071/EN19157.
@article{article, year = {2020}, pages = {74-84}, DOI = {10.1071/EN19157}, keywords = {catalytic stripping voltammetry, derivative transformation, estuaries, salinity gradient}, journal = {Environmental chemistry}, doi = {10.1071/EN19157}, volume = {17}, number = {2}, issn = {1448-2517}, title = {Determination of sub-picomolar levels of platinum in the pristine Krka River estuary (Croatia) using improved voltammetric methodology}, keyword = {catalytic stripping voltammetry, derivative transformation, estuaries, salinity gradient} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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