Utilization of lipophilic ionic additives in liquid polymer film optodes for selective anion activity measurements
Utilization of lipophilic ionic additives in liquid polymer film optodes for selective anion activity measurements
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DOI：
10.1021/ac960700f
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发表时间：
1997-03-15
影响因子：
7.4
通讯作者：
Kopelman, R
中科院分区：
文献类型：
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作者：
Barker, SLR;Shortreed, MR;Kopelman, R
研究了亲脂性阴离子和阳离子添加剂在液体聚合物薄膜光电器件中的应用。已知这些离子添加剂对阴离子选择性电极的选择性行为有强烈的影响，它们也使构建可以测量阴离子活性的离子共萃取光电器件成为可能。推导了阴离子光电平衡的理论和热力学形式，以帮助理解这些添加剂对整体光电响应和选择性行为的影响。描述了中性和带电阴离子载体膜结构，并测试了两种已知作用模式的阴离子离子载体，钌（TI）八乙基卟啉和维生素B-12衍生物（氰水化硼酸七烷基（2-苯乙基酯））。这些膜结构进一步测试使用不太了解的离子载体，铟（III）八乙基卟啉。值得注意的是铟（III）八烷基卟啉光电，它有一个动态范围适合生理测量氯在中性pH值。同样令人感兴趣的是具有维生素B-12衍生物离子载体的光电二极管，其动态范围适合于中性pH值下亚硝酸盐的一些生理测量。
Lipophilic anionic and cationic additives are investigated as components for use in liquid polymer film-based optodes. These ionic additives are known to strongly influence the selectivity behavior of anion-selective electrodes, They also make it possible to construct ion coextraction optodes that can measure anion activities. Theoretical, thermodynamic anion-optode equilibria formalisms were derived to help understand the influence these additives have on the overall optode response and on the selectivity behavior. Neutral and charged anion carrier film configurations are described and tested for two anion ionophores with known modes of action, ruthenium(TI) octaethylporphyrin and a vitamin B-12 derivative (cyanoaquacobyrinic acid heptakis(2-phenylethyl ester)). These film configurations were further tested using a less well-understood ionophore, indium(III) octaethylporphyrin. Notable is the indium(III) octaethylporphyrin optode, which has a dynamic range appropriate for physiological measurements of chloride at neutral pH values. Also of interest is the optode with the vitamin B-12 derivative ionophore, which has a dynamic range appropriate for some physiological measurements of nitrite at neutral pH values.