Izvorni znanstveni članak

https://doi.org/10.5562/cca3164

Application of a New Functionalized MWCNTs for the Construction of Surfactant Potentiometric Sensors

Sanja Petrušić ; Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8A, HR-31000 Osijek, Croatia
Mirela Samardžić ; Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8A, HR-31000 Osijek, Croatia
Aleksandar Széchenyi ; Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8A, HR-31000 Osijek, Croatia
Milan Sak-Bosnar ; Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8A, HR-31000 Osijek, Croatia

Sažetak

The multi-walled carbon nanotubes (MWCNTs) were noncovalently functionalized with tetraoctadecylammonium tetraphenylborate (TODA-TPB) used as a sensing element and incorporated into a liquid PVC membrane of the new fast, low drift and sensitive potentiometric sensor (FCNSS) for anionic surfactants (ASs). The sensor exhibits a sub-Nernstian response for both dodecyl sulfate (DS) and dodecylbenzenesulfonate in H2O and in 10 mM Na2SO4.
The lower limits of detection for DS and DBS in H2O were 1.5 · 10−7 and 2.0 · 10−7 M and in 10 mM Na2SO4, they were 2.0 · 10−7 M for both surfactants. The response time of the sensor varied between 8 and 12 s, depending on AS concentration and its signal drift was 2.1 mV/hour. The FCNSS exhibited excellent selectivity for DS against nearly all anions usually found in commercial products. It was successfully employed for end-point detection at potentiometric titrations of ASs in detergent products and effluents.

This work is licensed under a Creative Commons Attribution 4.0 International License.

Ključne riječi

tetraoctadecylammonium tetraphenylborate; MWCNT; anionic surfactant sensor; potentiometric titration; industrial products; effluents

Hrčak ID:

187188

URI

https://hrcak.srce.hr/187188

Datum izdavanja:

3.7.2017.

Posjeta: 1.773 *