Sensors 2007, 7(8), 1655-1666; doi:10.3390/s7081655
Article

Potentiometric Responses of Ion-Selective Electrodes Doped with Diureidocalix[4]arene towards Un-dissociated Benzoic Acid

1 Institute of Animal Reproduction and Food Research, Polish Academy of Sciences Tuwima 10, 10-747 Olsztyn, Poland 2 Department of Organic Chemistry, Institute of Chemical Technology, Technicka 5, 166 28 Prague 6, Czech Republic
* Author to whom correspondence should be addressed.
Received: 1 July 2007; Accepted: 26 August 2007 / Published: 27 August 2007
(This article belongs to the Special Issue Electrochemical Sensors Based on Conductive Polymers)
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Abstract: Diureidocalix[4]arene have been applied as new ionophore in liquid membraneelectrode (ISE) sensitive towards un-dissociated benzoic acid. The electrode demonstratedresponse towards benzoic acid with the detection limit 2.0 x 10-4 M which is sufficient forthe determination of benzoic acid added to beverages as preservative in milimolarconcentration. The selectivity coefficients measured by the matched potential method(MPM) showed its good selectivity against common anions present in drink samples. Allmeasurements were made in presence of 1.0 x 10-2 M NaHSO4 pH 3.0 in order to reducethe influence of OH-. The applicability of diureidocalix[4]arene incorporated ISE has beenchecked by recovery test of benzoic acid in the presence of artificial drink matrix and bystandard addition method.
Keywords: Diureidocalix[4]arene; Liquid membrane electrodes; Benzoic acid; Drink analysis.

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MDPI and ACS Style

Krajewska, A.; Lhotak, P.; Radecka, H. Potentiometric Responses of Ion-Selective Electrodes Doped with Diureidocalix[4]arene towards Un-dissociated Benzoic Acid. Sensors 2007, 7, 1655-1666.

AMA Style

Krajewska A, Lhotak P, Radecka H. Potentiometric Responses of Ion-Selective Electrodes Doped with Diureidocalix[4]arene towards Un-dissociated Benzoic Acid. Sensors. 2007; 7(8):1655-1666.

Chicago/Turabian Style

Krajewska, Agnieszka; Lhotak, Pavel; Radecka, Hanna. 2007. "Potentiometric Responses of Ion-Selective Electrodes Doped with Diureidocalix[4]arene towards Un-dissociated Benzoic Acid." Sensors 7, no. 8: 1655-1666.

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