Determination of cationic surfactants in pharmaceutical disinfectants using a new, highly sensitive potentiometric sensor (CROSBI ID 537631)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | domaća recenzija
Podaci o odgovornosti
Madunić-Čačić, Dubravka ; Sak-Bosnar, Milan ; Galović, Olivera ; Sakač, Nikola ; Matešić-Puač, Ružica ; Grabarić, Zorana
engleski
Determination of cationic surfactants in pharmaceutical disinfectants using a new, highly sensitive potentiometric sensor
A new sensitive potentiometric surfactant sensor was prepared based on a highly lipophilic 1, 3-didecyl-2-methyl-imidazolium (DMI) cation and a tetraphenylborate (TPB) antagonist ion. This compound was used as a sensing material and incorporated into the plasticized PVC-membrane. The sensor responded fast and showed a Nernstian response for all the investigated cationic surfactants: 59.8 mV/decade for cetylpyridinium chloride (CPC), 58.6 mV/decade for hexadecyltrimethylammonium bromide (CTAB), and 56.8 mV/decade for Hyamine. The sensor served as an end-point detector in ion-pair surfactant potentiometric titrations using sodium tetraphenylborate as titrant, and displayed satisfactory analytical performances within a pH range of two to eleven. The influence of the ethoxylated alcohols (EONS), a widely used class of nonionic surfactants on the shape of titration curves was negligible if the mass ratio of EONS:CS was not greater than five. The selectivity coefficients were determined by fitting the Nikolskii-Eisenman equation to the experimental data obtained by the mixed solution method. The sensor exhibited excellent selectivity performances for CPC over all organic and inorganic cations investigated. Several commercial disinfectant products containing various cationic surfactants were potentiometrically titrated using the new DMI-TPB sensor as an indicator.
Potentiometric sensor; Cationic surfactants; Pharmaceutical disinfectants
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Podaci o prilogu
288-289.
2008.
objavljeno
Podaci o matičnoj publikaciji
1st Regional Symposium on Electrochemistry of South-East Europe
Horvat-Radošević, Višnja ; Mandić, Zoran ; Gojo, Miroslav
Zagreb: Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI)
978-953-6894-33-8
Podaci o skupu
1st Regional Symposium on Electrochemistry of South-East Europe
poster
04.05.2008-08.05.2008
Rovinj, Hrvatska