Naslov
A New Anionic Surfactant-Sensitive Potentiometric Sensor with a Highly Lipophilic Electroactive Material

Autori
Madunić-Čačić, Dubravka ; Sak-Bosnar, Milan ; Matešić-Puač, Ružica

Izvornik
International Journal of Electrochemical Science (1452-3981) 6 (2011), 1; 240-253

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
ion-sensitive sensor; PVC membrane; anionic surfactant; potentiometric titration; detergent products

Sažetak
A hexadecyltrioctadecylammonium-tetraphenylborate (HTA-TPB) ion pair, incorporated into a plasticized PVC membrane as a sensing material, was used for the preparation of a new anionic surfactant sensor. The sensor exhibited a Nernstian response (58.1 mV/decade of activity) between 3 x 10-7 - 3 x 10-3 M for dodecyl sulfate. The interfering effect of several inorganic and organic anions, most frequently used in formulated products, was investigated. The influence of pH on the sensor behavior at potentiometric titrations was also studied. The sensor was used for end-point detection in potentiometric titrations of anionic surfactants. The homologous series of C7 – C12 alkane sulfonates and some commercial detergent products have been successfully titrated. The sensor and analyte parameters were estimated from the derivative curves and by multivariate analysis and the Solver optimization.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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