Lipophilic ionic additive for controlling the selectivity of ion-selective electrodes reversible to cations of nitrogen-containing organic bases

被引：0

作者：

Egorov, V.V. ^{[1
]}

Bolotin, A.A. ^{[2
]}

Koronevich, O.S. ^{[2
]}

机构：

[1] Research Institute of Physicochemical Problems, Belarussian State University, ul. Leningradskaya 14, Minsk, 220050, Belarus

[2] Department of Chemistry, Belarussian State University, ul. Leningradskaya 14, Minsk, 220050, Belarus

来源：

Journal of Analytical Chemistry | 2006年 / 61卷 / 11期

关键词：

The effect of a lipophilic ionic additive; a tetradecylammonium salt of a liquid ion exchanger; on the selectivity of ion-selective electrodes (ISEs) for cations of nitrogen-containing organic bases was studied. Additive-containing ISEs exhibited a higher selectivity for cations of primary to tertiary amines as compared to that for quaternary ammonium cations. A maximum change in selectivity (up to more than two orders of magnitude) due to the introduction of tetradecylammonium was observed for membranes containing dinonyladipate as a plasticizer and tris(nonyloxy)benzene sulfonic acid as an ion exchanger. In this case; the introduction of lipophilic ionic additive may lead to the reversal of the selectivity series. The effect of the lipophilic ionic additive on the selectivity of ISEs with membranes plasticized with o-nitrophenyl octyl ether decreased approximately by an order of magnitude. The selectivity of ISEs with the membranes containing tetrakis(4-chlorophenyl) borate as a cation exchanger was virtually independent of the presence of lipophilic ionic additives. The results obtained were explained by the peculiarities of ion-pair formation in the membrane. © Nauka/Interperiodica 2006;

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摘要：

Journal article (JA)

引用

页码：1124 / 1129

共 42 条

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