TY - JOUR
T1 - All-solid-state potentiometric sensors sensitive to nonionic surfactants based on ionophores containing ethoxylate units
AU - Martínez-Barrachina, Sílvia
AU - Alonso, Julián
AU - Matia, Lleonard
AU - Prats, Ramón
AU - Del Valle, Manuel
PY - 2001/6/21
Y1 - 2001/6/21
N2 - Earlier work of potentiometric Ion-selective electrodes (ISEs) sensitive to nonionic surfactants of the polyethoxylate type is further extended. The ISEs constructed were all-solid-state sensors with plasticized PVC membranes. The sensing material was a tetraphenylborate salt of the barium complex with a polyethoxylate nonionic surfactant. As membrane component, the combinations of two polyethoxylates of the nonylphenoxy type, which differed in the number of oxyethylene units (5 or 12), and two different plasticizers, (o-nitrophenyloctyl ether and o-nitrophenylphenyl ether), were tested. The response of these electrodes to different nonionic surfactants and the interference effect of several species has been evaluated. For all the types of tested electrodes, the sensitivities shown were ca. 30.0 mV dec-1 and the limit of detection, ca. 10-5 M, when a nonylphenoxyde with 12 oxyethylene units was used as standard. The membrane with the best response characteristics was then applied in potentiometric titrations of this kind of surfactants in the presence of Ba2+ ion and using tetraphenylborate as the titrant. © 2001 Elsevier Science B.V.
AB - Earlier work of potentiometric Ion-selective electrodes (ISEs) sensitive to nonionic surfactants of the polyethoxylate type is further extended. The ISEs constructed were all-solid-state sensors with plasticized PVC membranes. The sensing material was a tetraphenylborate salt of the barium complex with a polyethoxylate nonionic surfactant. As membrane component, the combinations of two polyethoxylates of the nonylphenoxy type, which differed in the number of oxyethylene units (5 or 12), and two different plasticizers, (o-nitrophenyloctyl ether and o-nitrophenylphenyl ether), were tested. The response of these electrodes to different nonionic surfactants and the interference effect of several species has been evaluated. For all the types of tested electrodes, the sensitivities shown were ca. 30.0 mV dec-1 and the limit of detection, ca. 10-5 M, when a nonylphenoxyde with 12 oxyethylene units was used as standard. The membrane with the best response characteristics was then applied in potentiometric titrations of this kind of surfactants in the presence of Ba2+ ion and using tetraphenylborate as the titrant. © 2001 Elsevier Science B.V.
KW - Alkylphenol polyethoxylates
KW - All-solid-state ion-selective electrode
KW - Nonionic surfactants
KW - Plasticized PVC-membrane
U2 - 10.1016/S0039-9140(01)00332-0
DO - 10.1016/S0039-9140(01)00332-0
M3 - Article
VL - 54
SP - 811
EP - 820
JO - Talanta
JF - Talanta
SN - 0039-9140
IS - 5
ER -