20.500.12556/DKUM-90157 Potentiometric surfactant sensor with a pt-doped acid-activated multi-walled carbon nanotube-based ionophore nanocomposite Two new surfactant sensors were developed by synthesizing Pt-doped acid-activated multiwalled carbon nanotubes (Pt@MWCNTs). Two different ionophores using Pt@MWCNTs, a new plasticizer, and (a) cationic surfactant 1,3-dihexadecyl-1H-benzo[d]imidazol-3-ium-DHBI (Pt@MWCNT-DHBI ionophore) and (b) anionic surfactant dodecylbenzenesulfonate-DBS (Pt@MWCNT-DBS ionophore) composites were successfully synthesized and characterized. Both surfactant sensors showed a response to anionic surfactants (dodecylsulfate (SDS) and DBS) and cationic surfactants (cetylpyridinium chloride (CPC) and hexadecyltrimethylammonium bromide (CTAB)). The Pt@MWCNT-DBS sensor showed lower sensitivity than expected with the sub-Nernstian response of ≈23 mV/decade of activity for CPC and CTAB and ≈33 mV/decade of activity for SDS and DBS. The Pt@MWCNTDHBI surfactant sensor had superior response properties, including a Nernstian response to SDS (59.1 mV/decade) and a near-Nernstian response to DBS (57.5 mV/decade), with linear response regions for both anionic surfactants down to ≈2 × 10−6 M. The Pt@MWCNT-DHBI was also useful in critical micellar concentration (CMC) detection. Common anions showed very low interferences with the sensor. The sensor was successfully employed for the potentiometric titration of a technical grade cationic surfactant with good recoveries. The content of cationic surfactants was measured in six samples of complex commercial detergents. The Pt@MWCNT-DHBI surfactant sensor showed good agreement with the ISE surfactant sensor and classical two-phase titration and could be used as an analytical tool in quality control potentiometric surfactant sensor metal-doped MWCNT surfactants carbon nanocomposite sensors senzorji surfaktanti karbonski nanodelci true false true MDPI Angleški jezik Slovenski jezik https://www.mdpi.com/journal/sensors © 2024 by the authors Članek v reviji 2024-08-23 12:14:16 2024-08-23 12:14:18 2026-01-14 03:14:41 0000-00-00 00:00:00 2024 0 0 14 str. iss. 8, [article no.] 2388 Vol. 24 8 April 2024 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 2024-03-10 2024-04-08 2024-04-09 681.586 192015107 10.3390/s24082388 1424-8220 sensors-24-02388.pdf sensors-24-02388.pdf 1 4EDF4F512556A2FD140DF0EC153F36BE fa1779e8907603b5967c607e5463cca11766f0c8b5f30b9e22b76ce87f350a8d 7eb82153-f04c-11f0-823a-00155d580e02 https://dk.um.si/Dokument.php?lang=slv&id=201926 https://www.mdpi.com/1424-8220/24/8/2388 0 88431429-f04c-11f0-823a-00155d580e02 https://dk.um.si/Dokument.php?lang=slv&id=201927 Fakulteta za elektrotehniko, računalništvo in informatiko 0 0 0