Plasticizer Effects in the PVC Membrane of the Dibasic Phosphate Selective Electrode.
Plasticizer Effects in the PVC Membrane of the Dibasic Phosphate Selective Electrode.
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DOI：
10.3390/chemosensors3040284
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发表时间：
2015-12
期刊：
影响因子：
--
通讯作者：
Carey C
中科院分区：
文献类型：
--
作者：
Carey C
对二元磷酸根离子(HPO4-ISE)敏感的离子选择电极(ISE)的聚氯乙烯膜还没有得到最大的选择性、灵敏度和可用ISE寿命的优化，需要进一步的工作来提高其性能。这里报告了两个方面的研究：包括所用增塑剂化合物的亲脂性参数和聚氯乙烯膜中加入的环多胺离子载体的量。评价了6种亲脂性范围内的候选增塑剂对ISE的使用寿命、灵敏度和对13种不同阴离子的选择性的影响。用改进的固定干扰物方法测定选择性，在没有干扰物的情况下测定灵敏度，并在50%的HPO4-ISE失效时评估可用寿命(L50)。结果表明，选择亲脂性与离子载体相近的增塑剂，可以获得最好的选择性和灵敏度以及最长的L50。
The PVC membrane of an ion-selective electrode (ISE) sensitive to dibasic phosphate ions (HPO4-ISE) has not been optimized for maximum selectivity, sensitivity, and useable ISE lifetime and further work was necessary to improve its performance. Two areas of investigation are reported here: include the parameters for the lipophilicity of the plasticizer compound used and the amount of cyclic polyamine ionophore incorporated in the PVC membrane. Six candidate plasticizers with a range of lipophilicity were evaluated for their effect on the useable lifetime, sensitivity, and selectivity of the ISE against 13 different anions. Selectivity was determined by a modified fixed interferent method, sensitivity was determined without interferents, and the usable lifetime evaluated at the elapsed time where 50% of the HPO4-ISE failed (L50). The results show that choosing a plasticizer that has a lipophilicity similar to the ionophore's results in the best selectivity and sensitivity and the longest L50.