A COMPARATIVE-STUDY OF THE EFFECT OF ORTHO-NITROPHENYL OCTYL ETHER AND ORTHO-NITROPHENYL PENTYL ETHER AS PLASTICIZERS ON THE RESPONSE AND SELECTIVITY OF CARRIER-BASED LIQUID MEMBRANE ION-SELECTIVE ELECTRODES
A COMPARATIVE-STUDY OF THE EFFECT OF ORTHO-NITROPHENYL OCTYL ETHER AND ORTHO-NITROPHENYL PENTYL ETHER AS PLASTICIZERS ON THE RESPONSE AND SELECTIVITY OF CARRIER-BASED LIQUID MEMBRANE ION-SELECTIVE ELECTRODES
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DOI：
10.1016/0039-9140(88)80184-x
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发表时间：
1988-10-01
期刊：
影响因子：
6.1
通讯作者：
BARTSCH, RA
中科院分区：
文献类型：
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作者：
ATTIYAT, AS;CHRISTIAN, GD;BARTSCH, RA
在流动池中用含有四种不同离子载体的聚氯乙烯膜包覆预处理银丝的尖端，制备了锂、钾和铯选择性微电极。电极基质中使用了二羧胺、14-冠-4羧酸、苯并-18-冠-6和二(叔丁基苯并)-21-冠-7离子载体。前两个离子载体用于锂离子选择电极，第三个用于钾离子电极，第四个用于铯离子电极。使用了两种不同的增塑剂：邻硝基苯基辛基醚(NPOE)和邻硝基苯基戊基醚(NPP‘e)。当使用NPP‘e作为增塑剂时，在所有情况下都观察到信号增强和标准曲线的斜率增加，曲线线性改善。当NPP‘E作为增塑剂时，还观察到了含有冠醚离子载体的电极选择性提高的总体趋势。
Lithium, potassium and caesium-selective microelectrodes were prepared by coating the tips of preconditioned silver wires, incorporated in a flow-cell, with PVC membranes containing four different ionophores. A dicarboxamide, a 14-crown-4 carboxylic acid, benzo-18-crown-6 and di-(tert-butylbenzo)-21-crown-7 ionophores were used in the electrode matrix. The first two ionophores were used in lithium ion-selective electrodes, the third in a potassium ion electrode and the fourth in a caesium ion electrode. Two different plasticizers,o-nitrophenyl octyl ether (NPOE) ando-nitrophenyl pentyl ether (NPP'E) were used. Enhancement of the signal and the slope of the calibration curve and improvement of the curve linearity were observed in all cases when NPP'E was used as plasticizer. A general trend of enhanced selectivity of the electrodes incorporating crown ether ionophores was also observed when NPP'E was the plasticizer.