Naslov
Sensing of aquatic pollutants: mixed lipid monolayers as a sensing template

Autori
Gašparović, Blaženka ; Penezić, Abra ; Coldrick, Zachary ; Nelson, Andrew

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

Izvornik
Abstract book of the 43rd IUPAC World Chemistry Congress 2011 / - : Međunarodna unija za čistu i primijenjenu kemiju (IUPAC), 2011, 288-288

Skup
43rd IUPAC World Chemistry Congress 2011

Mjesto i datum
Sjedinjene Američke Države; Portoriko, 30.07.2011. - 07.08.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
Sensor; pollutants; mixed lipid monolayers

Sažetak
The importance of oceans and waters in general and the need to monitor and exploit them increases the necessity for fast sensors for pollutants. Lipophylic aquatic pollutants show biomembrane activity [1]. The interaction causes a disruption of the lipid monolayer organization, which can be monitored using alternating current (ac) and fast cyclic (cv) voltammetry on a hanging mercury drop electrode (HMDE). Development of a biomembrane mimicking electrochemical biosensor using mixed lipid monolayers optimised for interactions with specific analyte will be discussed. Mixed monolayers of palmitoyl-2-oleoyl-sn-glicero-3- phosphocholin (POPC) and triolein, a trigliceride of oleic acid, were tested in interactions with phenanthrene. In order to improve the specificity and sensitivity of the monolayer, different molar ratios of lipids were tested. Figure 1. shows a shift of the reorientation peak potential of monolayer of POPC and triolein in a 3:1 molar ratio with increasing concentrations of phenanthrene. The work was also done using a flow cell system with a chip based mercury microelectrode [2]. Further optimisation of the mixed lipid monolayers will be made in order to enable detection of different type of pollutants such as polychlorinated biphenyls, tributyltins and toxins such as domoic and ocadaic acid.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA