Naslov
Nonionic surfactant-selective electrode and its application for determination in real solutions

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

Izvornik
Analytica Chimica Acta (0003-2670) 581 (2007), 2; 355-363

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

Ključne riječi
surfactant electrode; poly(vinyl chloride) membrane; polyethoxylated nonionic surfactant; potentiometric titration; detergent products

Sažetak
A liquid membrane nonionic surfactant sensitive electrode has been prepared, based on a new barium pseudocationic complex of a highly ethoxylated fatty alcohol polyglycol ether and tetraphenylborate as sensing material. The complex has been incorporated into the plasticized PVC-membrane and used as sensing material. The electrode exhibited positive linear non-Nernstian response toward different nonionic surfactants and sub-Nernstian response toward tetraphenylborate with the lower detection limit of 3.3×10− 7 mol dm− 3 in barium chloride solution. The interfering effect of some alkaline, alkaline earth, and heavy metal cations, has been demonstrated by displaying their calibration curves compared with that of Triton X-100. The electrode has been used as an end-point indicator for potentiometric titration of analytical and technical grade polyethoxylated nonionic surfactants, modelled detergent products, and commercial detergents.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA