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

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ABSTRACT

Diureidocalix[4]arene have been applied as new ionophore in liquid membrane electrode (ISE) sensitive towards un-dissociated benzoic acid. The electrode demonstrated response towards benzoic acid with the detection limit 2.0 × 10-4 M which is sufficient for the determination of benzoic acid added to beverages as preservative in milimolar concentration. The selectivity coefficients measured by the matched potential method (MPM) showed its good selectivity against common anions present in drink samples. All measurements were made in presence of 1.0 × 10-2 M NaHSO4 pH 3.0 in order to reduce the influence of OH-. The applicability of diureidocalix[4]arene incorporated ISE has been checked by recovery test of benzoic acid in the presence of artificial drink matrix and by standard addition method.

No MeSH data available.


The structure of diureidocalix[4]arene.
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f1-sensors-07-01655: The structure of diureidocalix[4]arene.

Mentions: Diureido derivatives of calix[4]arenes in 1,3-alternate conformer represents ionophores with one anionic binding site (Figure 1). It has been already reported that similar calixarene with two ureido moiety showed strongest interaction in one organic phase with benzoate ions [9]. In the work presented, diureidocalixarene has been studied as the ionophore of ISE destined for determination of benzoic acid in its undissociated form.


Potentiometric Responses of Ion-Selective Electrodes Doped with Diureidocalix[4]arene towards Un-dissociated Benzoic Acid
The structure of diureidocalix[4]arene.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3814874&req=5

f1-sensors-07-01655: The structure of diureidocalix[4]arene.
Mentions: Diureido derivatives of calix[4]arenes in 1,3-alternate conformer represents ionophores with one anionic binding site (Figure 1). It has been already reported that similar calixarene with two ureido moiety showed strongest interaction in one organic phase with benzoate ions [9]. In the work presented, diureidocalixarene has been studied as the ionophore of ISE destined for determination of benzoic acid in its undissociated form.

View Article: PubMed Central

ABSTRACT

Diureidocalix[4]arene have been applied as new ionophore in liquid membrane electrode (ISE) sensitive towards un-dissociated benzoic acid. The electrode demonstrated response towards benzoic acid with the detection limit 2.0 × 10-4 M which is sufficient for the determination of benzoic acid added to beverages as preservative in milimolar concentration. The selectivity coefficients measured by the matched potential method (MPM) showed its good selectivity against common anions present in drink samples. All measurements were made in presence of 1.0 × 10-2 M NaHSO4 pH 3.0 in order to reduce the influence of OH-. The applicability of diureidocalix[4]arene incorporated ISE has been checked by recovery test of benzoic acid in the presence of artificial drink matrix and by standard addition method.

No MeSH data available.