Naslov
Chronopotentiometric stripping method in the analysis of polymeric organic material in seawater

Autori
Strmečki, Slađana ; Plavšić, Marta ; Ćosović, Božena

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts of the 1st Regional Symposium on Electrochemistry of South-East Europe / Horvat-Radošević, Višnja ; Mandić, Zoran ; Gojo, Miroslav - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2008, 338-339

ISBN
978-953-6894-33-8

Skup
1st Regional Symposium on Electrochemistry of South-East Europe

Mjesto i datum
Rovinj, Hrvatska, 04.05.2008. - 08.05.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
Chronopotentiometric stripping analysis; N-containing polymeric organic material; seawater

Sažetak
Polymeric organic material, mainly polysaccharides(PS), represents the main fraction of phytoplankton organic exudates. Organic material from seawater samples and from diatom culture Skeletonema costatum sample was electrochemically characterized. Emphasis was on the determination of N-containing polymeric organic material(N-PM) as well as surface active substances(SAS) and copper complexing capacity(CuCC). Concentration of N-PM was expressed with respect to model protein-human serum albumin(HSA) which plot is a straight line. HSA contains 15% of nitrogen. Chronopotentiometric stripping signal (called "peak H") is a result of a "presodium" catalysis of electroreduction of hydrogen ion. Nitrogen carries hydrogen ions from bulk solution to the surface of mercury drop where they get reduced to form hydrogen, and "peak H" appears. It is situated at a quite negative potential (Ep~-1.70 to -1.80 V). Sensitive and fast chronopotentiometric stripping method (CPS) can be usefully applied for quantitative determination and characterization of different types of organic polymeric material in seawater.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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